| SO | salpingo-oophorectomy; Schlatter-Osgood [test]; second opinion; sex offender; spheno-occipital [sync... |
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| SR | sarcoplasmic reticulum; saturation recovery; scanning radiometer; screen; secretion rate; sedimentat... |
| SRO | sex-ratio organism; single room occupancy; smallest region of overlap; Steele-Richardson-Olszewski [... |
| SRS | schizophrenic residual state; sex reassignment surgery; Silver-Russell syndrome; simple repeat seque... |
| SSBG | sex steroid-binding globulin; social services block grant |
| Houssay animal | An animal that has been pancreatectomised and hypophysectomised. Named after the discoverer of the principle that animal's are more sensitive to insulin after removal of the pituitary, and that after this operation the intensity of diabetes in depancreatised animal's is diminished. (05 Mar 2000) |
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| normal animal | In research, an experimental animal that has neither suffered an attack of a particular disease nor received an injection of a specific microorganism or its toxin. (05 Mar 2000) |
| disease models, animal | Animal disease whose pathologic mechanisms are sufficiently similar to those of a different human disease for the animal disease to serve as a model. The animal disease may be either induced or naturally occurring so long as it is not the same clinical entity as the disease for which it serves as a model. E.g., scrapie is an animal model for multiple sclerosis, which has never been found or induced in an animal. (12 Dec 1998) |
| toxoplasmosis, animal | Acquired infection of non-human animals by organisms of the genus toxoplasma. (12 Dec 1998) |
| transgenic animal | Genetically engineered animalor offspring of genetically engineeredanimals. The transgenic animal usually contains material from at leaseone unrelated organism, such as from a virus, plant, or other animal. (09 Oct 1997) |
| laboratory animal science | The science and technology dealing with the procurement, breeding, care, health, and selection of animals used in biomedical research and testing. (12 Dec 1998) |
| lameness, animal | A departure from the normal gait in animals. It is also called claudication. (12 Dec 1998) |
| pili, sex | Filamentous or elongated proteinaceous structures which extend from the cell surface in gram-negative bacteria that contain certain types of conjugative plasmid. These pili are the organs associated with genetic transfer and have essential roles in conjugation. Normally, only one or a few pili occur on a given donor cell. this preferred use of "pili" refers to the sexual appendage, to be distinguished from bacterial fimbriae (fimbriae, bacterial), also known as common pili, which are usually concerned with adhesion. (12 Dec 1998) |
| primary sex characters | The sex glands, testes or ovaries, and the accessory sex organs. (05 Mar 2000) |
| safe sex | Sexual practices that limit the risk of transmitting or acquiring an infectious disease via exchanges of semen, blood, and other bodily fluids, e.g., use of a condom, mutual masturbation, and avoidance of anal intercourse. (05 Mar 2000) |
| heterogametic sex | <biology> The gender which has two different sex chromosomes. For example: In humans, the male is heterogametic because he is XY (has an X chromosome and a Y chromosome). In birds, the female is heterogametic because she is WZ (has a W chromosome and a Z chromosome). Compare: homogametic sex. (09 Oct 1997) |
| secondary sex characters | Those character's peculiar to the male or female that develop at puberty, e.g., the beard of men and the breasts of women. (05 Mar 2000) |
| homogametic sex | <genetics> The gender which has two copies of the same sex chromosome. For example: In humans, the female is homogametic because she is XX (has two copies of the X chromosome). In birds, the male is homogametic because he is ZZ (has two copies of the Z chromosome). Compare: heterogametic sex. (09 Oct 1997) |
| sex | 1. The distinguishing peculiarity of male or female in both animals and plants; the physical difference between male and female; the assemblage of properties or qualities by which male is distinguished from female. 2. One of the two divisions of organic beings formed on the distinction of male and female. 3. <botany> The capability in plants of fertilizing or of being fertilized; as, staminate and pistillate flowers are of opposite sexes. One of the groups founded on this distinction. The sex, the female sex; women, in general. Origin: L. Sexus: cf. F. Sexe. Source: Websters Dictionary (01 Mar 1998) |
| sex attractants | Pheromones that elicit sexual attraction or mating behaviour usually in members of the opposite sex in the same species. (12 Dec 1998) |