What's the difference between mass and weight?

Mass


Definition:

  • (n.) The sacrifice in the sacrament of the Eucharist, or the consecration and oblation of the host.
  • (n.) The portions of the Mass usually set to music, considered as a musical composition; -- namely, the Kyrie, the Gloria, the Credo, the Sanctus, and the Agnus Dei, besides sometimes an Offertory and the Benedictus.
  • (v. i.) To celebrate Mass.
  • (n.) A quantity of matter cohering together so as to make one body, or an aggregation of particles or things which collectively make one body or quantity, usually of considerable size; as, a mass of ore, metal, sand, or water.
  • (n.) A medicinal substance made into a cohesive, homogeneous lump, of consistency suitable for making pills; as, blue mass.
  • (n.) A large quantity; a sum.
  • (n.) Bulk; magnitude; body; size.
  • (n.) The principal part; the main body.
  • (n.) The quantity of matter which a body contains, irrespective of its bulk or volume.
  • (v. t.) To form or collect into a mass; to form into a collective body; to bring together into masses; to assemble.

Example Sentences:

  • (1) Here we report that sperm from psr males fertilizes eggs, but that the paternal chromosomes are subsequently condensed into a chromatin mass before the first mitotic division of the egg and do not participate in further divisions.
  • (2) Blood samples were analysed by mass spectroscopy and gas chromatography.
  • (3) Bilateral symmetric soft-tissue masses posterior to the glandular tissue with accompanying calcifications should suggest the diagnosis.
  • (4) The extent of the infectious process was limited, however, because the life span of the cultures was not significantly shortened, the yields of infectious virus per immunofluorescent cell were at all times low, and most infected cells contained only a few well-delineated small masses of antigen, suggestive of an abortive infection.
  • (5) The clinically normotensive cases had greater left ventricular mass than the normotensive controls (p less than 0.02).
  • (6) CT scan revealed a small calcified mass in the right maxillary sinus.
  • (7) The article describes an unusual case with development of a right anterior mediastinal mass after bypass surgery with internal mammary artery grafts.
  • (8) The increase in red blood cell mass was associated with an elevation in erythropoietic stimulatory activity in serum, pleural fluid, and tumor-cyst fluid as determined by the exhypoxic polycythemic mouse assay.
  • (9) The groups were matched with regard to sex, age and body mass index.
  • (10) Based on the deduced amino acid sequence, rpL8 has a mass of 28,605 Da, a pI of 11.97, and contains 9.6% Arg and 11.9% Lys.
  • (11) All masses had either histologic confirmation (n = 11) or confirmation with other imaging modalities (n = 4).
  • (12) A neonate without external malformation had undergone removal of a nasopharyngeal mass containing anterior and posterior pituitary tissue.
  • (13) All patients with localized subaortic hypertrophy had left ventricular hypertrophy (left ventricular mass or posterior wall thickness greater than 2 SD from normal) with a normal size cavity due to aortic valve disease (2 patients were also hypertensive).
  • (14) By means of computed tomography (CT) values related to bone density and mass were assessed in the femoral head, neck, trochanter, shaft, and condyles.
  • (15) This can be achieved by sincere, periodic information through the mass media.
  • (16) However, the effects of such large-scale calvarial repositioning on subsequent brain mass growth trajectories and compensatory cranio-facial growth changes is unclear.
  • (17) Ether extracts were analyzed by gas chromatography-mass spectrometry (GC-MS) and various chlorinated and non-chlorinated compounds were detected, e.g.
  • (18) The spikes likely correspond to VP3, a hemagglutinin, while the rest of the mass density in the outer shell represents 780 molecules of VP7, a neutralization antigen.
  • (19) Variability (CV = 0.7%) in body volume of a 45-year-old reference man measured by SH method was very similar to variation (CV = 0.6%) in mass volume of the 60-1 prototype.
  • (20) The masses were solitary and located in the retroperitoneum (five cases), mediastinum (one case), and axilla (one case).

Weight


Definition:

  • (v. t.) The quality of being heavy; that property of bodies by which they tend toward the center of the earth; the effect of gravitative force, especially when expressed in certain units or standards, as pounds, grams, etc.
  • (v. t.) The quantity of heaviness; comparative tendency to the center of the earth; the quantity of matter as estimated by the balance, or expressed numerically with reference to some standard unit; as, a mass of stone having the weight of five hundred pounds.
  • (v. t.) Hence, pressure; burden; as, the weight of care or business.
  • (v. t.) Importance; power; influence; efficacy; consequence; moment; impressiveness; as, a consideration of vast weight.
  • (v. t.) A scale, or graduated standard, of heaviness; a mode of estimating weight; as, avoirdupois weight; troy weight; apothecaries' weight.
  • (v. t.) A ponderous mass; something heavy; as, a clock weight; a paper weight.
  • (v. t.) A definite mass of iron, lead, brass, or other metal, to be used for ascertaining the weight of other bodies; as, an ounce weight.
  • (v. t.) The resistance against which a machine acts, as opposed to the power which moves it.
  • (v. t.) To load with a weight or weights; to load down; to make heavy; to attach weights to; as, to weight a horse or a jockey at a race; to weight a whip handle.
  • (v. t.) To assign a weight to; to express by a number the probable accuracy of, as an observation. See Weight of observations, under Weight.

Example Sentences:

  • (1) Circuit weight training does not exacerbate resting or exercise blood pressure and may have beneficial effects.
  • (2) Low birth weight, short stature, and mental retardation were common features in the four known patients with r(8).
  • (3) A progressively more precise approach to identifying affected individuals involves measuring body weight and height, then energy intake (or expenditure) and finally the basal metabolic rate (BMR).
  • (4) After 55 days of unrestricted food availability the body weight of the neonatally deprived rats was approximately 15% lower than that of the controls.
  • (5) However, there was no correlation between the length of time PN was administered to onset of cholestasis and the gestational age or birth weight of the infants.
  • (6) In animal experiments pharmacological properties of the low molecular weight heparin derivative CY 216 were determined.
  • (7) Type 1 changes (decreased signal intensity on T1-weighted spin-echo images and increased signal intensity on T2-weighted images) were identified in 20 patients (4%) and type 2 (increased signal intensity on T1-weighted images and isointense or slightly increased signal intensity on T2-weighted images) in 77 patients (16%).
  • (8) No associations were found between sex, body-weight, smoking habits, age, urine volume or urine pH and the O-demethylation of codeine.
  • (9) The peak molecular weight never reached that of a complete 2:1 complex.
  • (10) low molecular weight dextran in the course of right heart catheterization.
  • (11) Pituitary weight, mitotic index and chromosomes were studied in male rats following a single or repeated dose of estradiol-benzoate for a total period of 210 days.
  • (12) Maximal yields of lipid and aflatoxin were obtained with 30% glucose, whereas mold growth, expressed as dry weight, was maximal when the medium contained 10% glucose.
  • (13) During the digestion of these radiolabeled bacteria, murine bone marrow macrophages produced low-molecular-weight substances that coeluted chromatographically with the radioactive cell wall marker.
  • (14) The molecular weight of antigen RFB2 was estimated to be approximately 85,000 daltons based on the results of gel filtration on Sepharose CL-6B.
  • (15) The product of the ugpQ gene, expressed in minicells, has an apparent molecular weight of 17,500.
  • (16) There were significant differences in the body weight of control and undernourished rats in each experiment.
  • (17) Milk yield and litter weights were similar but backfat thickness (BF) was greater in 22 C sows (P less than .05) compared to 30 C sows.
  • (18) After 2 weeks the rats were sacrificed and the brain damage evaluated by comparing the weight of the lesioned and unlesioned hemispheres.
  • (19) Preliminary data also suggest that high-molecular-weight rearrangements of the duplicated region are present in all tissues.
  • (20) It reduced serum AP levels, increased serum Ca levels, increased bone ash weight, epiphyseal and metaphyseal bone volume, with a concomitant reduction in epiphyseal and metaphyseal bone marrow volume.