a biogenic polyamine, H 2 N(CH 2) 4 NH(CH 2) 3 NH 2 , formed from putrescine, occurring widely in nature and first identified in semen.
spermidine sper·mi·dine (spûr’mĭ-dēn’)
A polyamine compound found in ribosomes and living tissues and having various metabolic functions. It was originally isolated from semen.
spermiduct sper·mi·duct (spûr’mĭ-dŭkt’) n. See vas deferens. See ejaculatory duct.
noun, Biochemistry. 1. a polyamine, H 2 N(CH 2) 3 NH(CH 2) 4 NH(CH 2) 3 NH 2 , formed from spermidine and occurring in all cells, especially prevalent in semen, sputum, pancreatic tissue, and certain yeasts. noun 1. a white or colourless basic water-soluble amine that is found in semen, sputum, and animal tissues; […]
[spur-mee-oh-jen-uh-sis] /ˌspɜr mi oʊˈdʒɛn ə sɪs/ noun, Cell Biology. 1. the development of a spermatozoon from a spermatid. spermiogenesis /ˌspɜːmɪəʊˈdʒɛnɪsɪs/ noun 1. the stage in spermatogenesis in which spermatozoa are formed from spermatids spermiogenesis sper·mi·o·gen·e·sis (spür’mē-ō-jěn’ĭ-sĭs) n. The stage of spermatogenesis during which spermatids are transformed into spermatozoa.
1. a combining form of sperm1 , used also with the meaning “seed,” “germ,” “semen,” in the formation of compound words: spermophyte.