What's the difference between tether and tither?

Tether

Definition:

(n.) A long rope or chain by which an animal is fastened, as to a stake, so that it can range or feed only within certain limits.
(v. t.) To confine, as an animal, with a long rope or chain, as for feeding within certain limits.

Example Sentences:

(1) A comparison was made between the Q's estimated by the CO2 rebreathing method during tethered swimming and previously published data on Q determined by the dye-dilution method during free swimming in a flune.
(2) In both conditions about half the number of cases presented clinically before the age of 3 months, when paraplegia was evident in only 5 of the 26 infants with tethered cord and 3 of the 25 with tethered roots.
(3) Alternatively, a loss of collagen tethers or decline in matrix tensile strength can be responsible for regional or global transformations in myocardial architecture and function seen in the reperfused ("stunned") myocardium and in dilated (idiopathic) cardiopathy.
(4) The hypothesis that a localized lordosis, or tethering of the posterior elements of the spine, is the primary cause of the vertebral rotation in idiopathic scoliosis was investigated in anatomic specimens of human and calf spinal columns.
(5) The ultrasound-induced negative phonotactic response of tethered, flying Australian field crickets habituates to repeated stimuli.
(6) In one patient, the fibrous band extended from the distal pole of the patella to the intracondylar notch, tethering the patella inferiorly.
(7) Single-chain antigen-binding proteins are novel recombinant polypeptides, composed of an antibody variable light-chain amino acid sequence (VL) tethered to a variable heavy-chain sequence (VH) by a designed peptide that links the carboxyl terminus of the VL sequence to the amino terminus of the VH sequence.
(8) We have described delayed presentation in an adult with evidence of the tethered spinal cord syndrome following myelomeningocele repair.
(9) We report 2 cases of the tethered spinal cord syndrome.
(10) Internal motions of the tethered Er-labeled ligands may also contribute to the observed anisotropy decay, particularly in the case of cell-bound IgE.
(11) Computerized interpretation of the electrocardiogram has now advanced to computerization of the electrocardiograph, resulting in greatly increased versatility, including the capacity for adapting to a variety of lead systems rather than being tethered to the old Einthoven-Wilson-Goldberger (EWG) system.
(12) Apple was asked to comment on this ability to unlock the iPhone tethering facility for free.
(13) Three cases of tethered cord syndrome are presented with reference of reported literatures.
(14) However visitors to benm.at – an iPhone and iPod touch enthusiasts' website – can download a profile that instantly activates the tethering system free of charge.
(15) A 14-residue peptide based on the tethered ligand stimulated the aggregation of gel-filtered platelets with an EC50 of 7 microM, and a concentration of 10 microM was the minimum concentration necessary to yield a full aggregation response in platelet-rich plasma.
(16) The ratio of the change in the length of the tether to the change in the projection length is proportional to the ratio of the pipette radius to the tether radius.
(17) Surgical repair with release of cord tethering at the time of diagnosis is advocated, regardless of patient age.
(18) In single-channel recordings, tethered agonists opened channels with the same conductance as reversibly bound agonists (30 pS at 15 degrees C and -100 mV).
(19) In a series of 75 patients with surgically treated lipomyelomeningoceles, the neurological condition of six patients deteriorated 6 months to 14 years after the operation due to repeat tethering of the spinal cord.
(20) Failure to release this structure from the proximal ulna caused kinking and tethering of the nerve when transposition was attempted.