Sperm
121sperm duct — (ANNELIDA) Ducts or tubes conveying sperm from the male funnels towards the exterior; see spermaduct, vas deferens …
122sperm bank — a repository for storing sperm and keeping it viable under scientifically controlled conditions prior to its use in artificial insemination. [1970 75] * * * …
123sperm cell — noun spermatozoon Syn: spermatozoon, sperm …
124sperm bank — noun a) A place where sperm from donors is stored for future use in artificial insemination. b) The vagina. Syn: cryobank …
125sperm-aster — Cytocentrum with astral rays in the cytoplasm of an inseminated ovum; it is brought in by the penetrating spermatozoon and evolves into the mitotic spindle of the first cleavage division. [sperm + G. aster, a star (as …
126sperm plug — A structure plugging the opercula and distal part of each genital duct of female crabs to prevent loss of sperm after copulation [Ingle, 1983] …
127sperm swim-up — the migration of spermatozoa into culture medium; see sperm swim up technique, under technique …
128sperm swim-up technique — any of several methods of checking sperm for motility; a semen sample is centrifuged to form pellets, which are then covered with culture medium. The spermatozoa with greatest motility will swim up into the culture medium and be more suitable for …
