What's the difference between screw and thread?

Screw


Definition:

  • (n.) A cylinder, or a cylindrical perforation, having a continuous rib, called the thread, winding round it spirally at a constant inclination, so as to leave a continuous spiral groove between one turn and the next, -- used chiefly for producing, when revolved, motion or pressure in the direction of its axis, by the sliding of the threads of the cylinder in the grooves between the threads of the perforation adapted to it, the former being distinguished as the external, or male screw, or, more usually the screw; the latter as the internal, or female screw, or, more usually, the nut.
  • (n.) Specifically, a kind of nail with a spiral thread and a head with a nick to receive the end of the screw-driver. Screws are much used to hold together pieces of wood or to fasten something; -- called also wood screws, and screw nails. See also Screw bolt, below.
  • (n.) Anything shaped or acting like a screw; esp., a form of wheel for propelling steam vessels. It is placed at the stern, and furnished with blades having helicoidal surfaces to act against the water in the manner of a screw. See Screw propeller, below.
  • (n.) A steam vesel propelled by a screw instead of wheels; a screw steamer; a propeller.
  • (n.) An extortioner; a sharp bargainer; a skinflint; a niggard.
  • (n.) An instructor who examines with great or unnecessary severity; also, a searching or strict examination of a student by an instructor.
  • (n.) A small packet of tobacco.
  • (n.) An unsound or worn-out horse, useful as a hack, and commonly of good appearance.
  • (n.) A straight line in space with which a definite linear magnitude termed the pitch is associated (cf. 5th Pitch, 10 (b)). It is used to express the displacement of a rigid body, which may always be made to consist of a rotation about an axis combined with a translation parallel to that axis.
  • (n.) An amphipod crustacean; as, the skeleton screw (Caprella). See Sand screw, under Sand.
  • (v. t.) To turn, as a screw; to apply a screw to; to press, fasten, or make firm, by means of a screw or screws; as, to screw a lock on a door; to screw a press.
  • (v. t.) To force; to squeeze; to press, as by screws.
  • (v. t.) Hence: To practice extortion upon; to oppress by unreasonable or extortionate exactions.
  • (v. t.) To twist; to distort; as, to screw his visage.
  • (v. t.) To examine rigidly, as a student; to subject to a severe examination.
  • (v. i.) To use violent mans in making exactions; to be oppressive or exacting.
  • (v. i.) To turn one's self uneasily with a twisting motion; as, he screws about in his chair.

Example Sentences:

  • (1) Total excision and immediate reconstruction were done with alloplastic material fixated with microplates and screws.
  • (2) Two hundred and forty root canals of extracted single-rooted teeth were prepared to the same dimension, and Dentatus posts of equal size were cemented without screwing them into the dentine.
  • (3) The committee's findings include that the attacks were not extensively planned by the perpetrators; the intelligence community did a good job of warning about the risk of an attack but a bad job of summarizing the attack when it happened; the state department screwed up by not beefing up security at the mission; nobody blocked any military response; and that the Obama administration was slow to produce a paper trail but was generally not a sinister actor in the episode.
  • (4) The pedicle screw systems were always the most rigid.
  • (5) Closure is accomplished by suture of soft tissues and reattachment of the posterior trochanteric fragment with bone screws.
  • (6) Two of the 7 sets of iliosacral screws failed postoperatively (28%).
  • (7) An algorithm is implemented to determine the form and phase shift for inconsistent type II quadrupoles for any space group having glide or screw-axis translations which are not a consequence of lattice centering.
  • (8) It constitutes an alternative to Ender nailing, screw-plate, and nail-plate.
  • (9) Changes in radiostrontium clearance (SrC) and bone formation (tetracycline labeling) were observed in the femurs of skeletally mature dogs following the various operative steps involved in bone screw fixation.
  • (10) Several conventional internal fixation techniques and a three converging screw method were used.
  • (11) The criteria of failure of pedicular instrumentation or "death" of an implant were defined as 1) screw bending, 2) screw breakage, 3) infection, 4) loosening of implants, 5) any rod or plate hardware problems, or 6) removal of hardware due to a neurologic complication.
  • (12) Cadaver studies have been carried out and transpedicular screw position has been confirmed by computed tomography scan.
  • (13) In this study, we performed a series of in vitro tests to compare the breaking strength of plated bone analogues that used either unicortical or bicortical end screws.
  • (14) Successful treatment of scaphoid nonunions with screw fixation and cast-free after-treatment does not depend on the implant used but rather on careful case selection and precise surgical technique.
  • (15) The Herbert bone screw was initially developed for management of fractures of the carpal scaphoid.
  • (16) Plus, unlike planet-screwing fossil fuels, solar could actually be subsidy-free in a few years.
  • (17) The intensity-measuring device in both apparatuses has a mobile disk attached to a motionless axis by a spiral spring; the clamps have fixing screws in the butts of a spong.
  • (18) A variety of quality tests, of biomechanical screws, are used, before performing the operations, that flaws may be detected.
  • (19) Most fractures were fixed with interfragmentary screws and external fixators.
  • (20) To give variations in the peak flow-rate (from pulsatile to intermediate to non-pulsatile), three types of blood pump (piston-bellows, screw, and centrifugal) were applied to dogs.

Thread


Definition:

  • (n.) A very small twist of flax, wool, cotton, silk, or other fibrous substance, drawn out to considerable length; a compound cord consisting of two or more single yarns doubled, or joined together, and twisted.
  • (n.) A filament, as of a flower, or of any fibrous substance, as of bark; also, a line of gold or silver.
  • (n.) The prominent part of the spiral of a screw or nut; the rib. See Screw, n., 1.
  • (n.) Fig.: Something continued in a long course or tenor; a,s the thread of life, or of a discourse.
  • (n.) Fig.: Composition; quality; fineness.
  • (v. t.) To pass a thread through the eye of; as, to thread a needle.
  • (v. t.) To pass or pierce through as a narrow way; also, to effect or make, as one's way, through or between obstacles; to thrid.
  • (v. t.) To form a thread, or spiral rib, on or in; as, to thread a screw or nut.

Example Sentences:

  • (1) Use 3-ml Luer-Lok syringes and 30-gauge needles and thread the needle carefully into the vessel while using slow and steady injection with light pressure.
  • (2) No infection threads were found to penetrate either root hairs or the nodule cells.
  • (3) When using a nylon thread for the attachment of a pseudophakos to the iris, it may happen that the suture is slung tightly around the implant-lens.
  • (4) This thread ran through his later writings, which focused particularly on questions of the transformation of work and working time, envisaging the possibility that the productivity gains made possible by capitalism could be used to enhance individual and social life, rather than intensifying ruthless economic competition and social division.
  • (5) Santi Cazorla, Sánchez and Mesut Özil were all involved, and when the ball came back to Cazorla he made a fine threaded pass to Walcott.
  • (6) We've brought on two experts to answer your questions from 1-2pm BST in the comment thread on this article.
  • (7) The astrocytes had generally two types of processes: (1) thread-like processes of relatively constant width with few ramifications and few lamellar appendages and (2) the sinuous processes with clusters of lamellar appendages.
  • (8) Electron microscopy showed the presence of bacterial ghosts and protein threads.
  • (9) George RR Martin , whose series of novels inspired the HBO drama , has woven a tapestry of extraordinary size and richness; and most of the threads he has used derive from the history of our own world.
  • (10) The left anterior descending coronary artery of dogs and the right common carotid artery of rabbits were subjected to partial constriction with suture thread (40-60% reduction in transluminal diameter).
  • (11) Neuronal thread protein is a recently characterized, approximately 20-kd protein that accumulates in brains with Alzheimer's disease (AD) lesions.
  • (12) Small threaded pins do not cause femoral head rotation.
  • (13) Nematocyst capsules and everted threads from both species contained levels of glycine and proline-hydroxyproline characteristic of vertebrate collagens.
  • (14) Load transfer from ring to bone is concentrated at the first and last threads where the subchondral bone layer is penetrated.
  • (15) Furthermore, large numbers of neuropil threads are scattered throughout the nuclear gray.
  • (16) The histological findings of actinomyces spores, thread-like foreign material and detritus drew out attention to the rare manifestation of abdominal actinomycosis.
  • (17) Monofilament nylon threads are used as drains in free skin grafting; 2-0 or 3-0 nylon threads are usually applied.
  • (18) Monoclonal antibodies, raised independently in two laboratories against either pancreatic stone protein (PSP) or pancreatic thread protein (PTP), reacted with the Mr 14,000 protein(s).
  • (19) With the initial technique, the gastrostomy tube was pulled in by a thread introduced percutaneously into the stomach.
  • (20) P19 gave by proteolysis a protein of 14 KD (P14), at first named protein X and also called pancreatic thread protein or pancreatic stone protein.