Sperm - Spider

sperm

(spĕrm) [Gr. sperma, seed] 1. Semen. 2. Spermatozoa. SEE: illus.

NORMAL AND ABNORMAL SPERM

sperma

(spĕr′mă) [Gr.] 1. Semen. 2. Spermatozoa.

sperma-, sperm-, spermi-, spermo-

[Gr. sperma, seed] Prefixes meaning seed, semen, sperm. SEE: spermato-.

spermagglutination

(spĕr″mă-gloo″tĭ-nā′shŭn) Agglutination of spermatozoa.

spermatic

(spĕr-măt′ĭk) [Gr. sperma, seed] Pert. to semen or sperm.

 spermatic vein SEE: under vein.

spermatid

(spĕr′mă-tĭd) [spermat- + -ide, -id] A cell arising by division of the secondary spermatocyte to become a spermatozoon. SYN: spermatoblast. SEE: ootid.

spermato-, spermat-

[Gr. sperma, stem spermat-, seed] Prefixes meaning seed. SEE: sperma-.

spermatocele

(spĕr-măt′ō-sēl) [″ + kele, tumor, swelling] A cystic tumor of the epididymis containing spermatozoa.

spermatocidal

(spĕr″mă-tō-sī′dăl) [″ + L. cidus, kill] Destroying spermatozoa.

spermatocyst

(spĕr-măt′ō-sĭst) [″ + kystis, bladder] 1. A seminal vesicle. 2. A tumor of the epididymis containing semen. SEE: spermatocele.

spermatocyte

(spĕr-măt′ō-sīt) [″ + kytos, cell] A cell originating from a spermatogonium that divides to form spermatids, which become spermatozoa.

 primary s. A cell formed by mitosis of a spermatogonium.

 secondary s. A cell formed by meiosis of a primary spermatocyte. It undergoes a second meiotic division to form two spermatids, each with the haploid number of chromosomes.

spermatogenesis

(spĕr″măt-ō-jĕn′ĕ-sĭs) [″ + genesis, generation, birth] The formation of mature functional spermatozoa. In the process, undifferentiated spermatogonia become primary spermatocytes, each of which divides to form two secondary spermatocytes. Each of these divides to form two spermatids, which transform into functional motile spermatozoa. In the process, the chromosome number is reduced from the diploid to the haploid number. SEE: illus.; gametogenesis; maturation; meiosis.

SPERMATOGENESIS

spermatogenic, spermatogenous

(spĕr″mă-tō-jĕn′ĭk, spĕr″mă-tŏj′ĕ-nŭs) Producing sperm.

spermatogonium

(spĕr″măt-ō-gō′nē-ŭm) pl. spermatogonia [″ + gone, generation] A large unspecialized germ cell that in spermatogenesis divides by mitosis to form primary spermatocytes. SEE: spermatogenesis.

spermatology

(spĕr″mă-tŏl′ō-jē) [″ + logos, word, reason] The study of the seminal fluid.

spermatorrhea

(spĕr″mă-tō-rē′ă) [″ + rhoia, flow] An abnormally frequent involuntary loss of semen without orgasm.

spermatotoxin

(spĕr″mă-tō-tŏk′sĭn) [″ + toxikon,...