body weight(redirected from Body mass)
Also found in: Dictionary, Thesaurus, Legal, Financial, Encyclopedia.
1. the trunk, or animal frame, with its organs.
2. the largest and most important part of any organ.
3. any mass or collection of material.
see ketone bodies.
formed in degenerating myelin sheaths. Each contains a fragment of myelin apparently undergoing enzymatic digestion around a fragment of degenerating axon.
see corpus fimbriatum.
see body fluids.
a 3-5 mm glycogen-rich body in the dorsal surface of the lumbosacral enlargement of the spinal cord in birds.
geniculate b's (lateral)
two metathalamus eminences, one on each side just lateral to the medial geniculate bodies, marking the termination of the optic tract.
geniculate b's (medial)
two metathalamus eminences, one on each side, just lateral to the superior colliculi, concerned with hearing.
Heinz body, Heinz-Ehrlich body
a dark staining refractile body of erythrocytes, consisting of denatured hemoglobin. See also Heinz body anemia.
see howell-jolly bodies.
either of the pair of small spherical masses in the interpeduncular fossa of the midbrain, forming part of the hypothalamus.
see body weight.
any of the osmiophilic, lipid-rich, layered bodies found in the type II alveolar cells of the lung.
eosinophilic, oval or round inclusion bodies in the cytoplasm of neurones of animals dead of rabies.
see olive (2).
dark, basophilic, iron-containing granules seen in erythrocytes (siderocytes). Occur in hemolytic anemia.
enclaves of chromaffin cells near the sympathetic ganglia along the abdominal aorta, which secrete catecholamines during prenatal and early postnatal life, aiding the adrenal medulla. Tumors of these structures produce clinical signs similar to those of pheochromocytoma.
paracloacal vascular body
a small patch of vascular tissue in the wall of the urodeum in birds.
pair of bodies flanking the phallus of the male bird; participate in the insemination of the hen.
see corpora quadrigemina.
see corpus striatum.
body surface area (BSA)
the total surface area of the body. Used to calculate drug dosages, particularly in the use of toxic drugs such as those used in cancer chemotherapy. This minimizes errors introduced by variations in distribution, metabolism and excretion of the drug. Several equations can be used to express the area, based on body weight, but conversion tables are usually used. See Table 21.
transverse ridge crossing the ventral surface of the medulla oblongata.
the transparent gel filling the posterior segment of the eyeball between the lens and retina. Called also vitreous and vitreous humor.
see body weight.
heaviness; the degree to which a body is drawn toward the earth by gravity. See also Tables 4.1 and 4.2.
an outmoded system of weight used in compounding prescriptions based on the grain (equivalent 64.8 mg). Its units are the scruple (20 grains), dram (3 scruples), ounce (8 drams) and pound (12 ounces). See also Tables 4.2 and 4.3.
the weight of an atom of a chemical element, compared with the weight of an atom of carbon-12, which is taken as 12.00000.
the system of weight still used for ordinary commodities in some English-speaking countries. Its units are the dram (27.344 grains), ounce (16 drams) and pound (16 ounces).
weight of the newborn at the time of birth.
the animal's weight. In herbivores this is often debatable because of the variation in 'gut-fill' depending on the availability of palatable food. In the absence of scales the weights of large animals are often estimated on the basis of their age and their girth just behind the elbow. Called also liveweight. See also body condition score.
body weight-to-surface area
determination of many drug dosages is physiologically more accurate when based on body surface area rather than body weight; used particularly in cancer chemotherapy. For conversion table for use in dogs see Table 21.
the weight in grams of a substance that is equivalent in a chemical reaction to 1.008 g of hydrogen. See also chemical equivalent.
increase in body weight for specific periods; the principal measure of productivity in meat animals.
the loss of body weight from that previously measured. This estimate must take into account the difference in 'gut-fill' and the effects of developing pregnancy and recent parturition.
see Tables 4.1 and 4.2.
the weight of a molecule of a chemical compound as compared with the weight of an atom of carbon-12; it is equal to the sum of the weights of its constituent atoms. Abbreviated mol. wt. See also Table 6.
shifting weight limb to limb
sign indicative of lameness especially in horses; while standing the horse is continually shifting its weight from one limb to the opposite one of the pair.