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English Words Starting With S
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- spermatid/ˈspɜːmətɪd/A haploid male gamete cell that develops into a spermatozoon during spermatogenesis.nounC2
- spermatium/spɜːˈmeɪʃɪəm/In biology, specifically mycology and phycology, a non-motile male gamete (sperm cell) in certain fungi and red algae, which is transferred to the female reproductive structure for fertilization.nounVery Low
- spermatocide/ˈspɜː.mə.təʊ.saɪd/A substance that kills sperm cells.nounVery Low
- spermatocyte/ˈspɜː.mə.təˌsaɪt/A cell in the male reproductive system that undergoes division to eventually form sperm cells.nounVery Low (Technical/Specialized)
- spermatogenesis/ˌspɜːmətəʊˈdʒenɪsɪs/The biological process of sperm cell development and maturation.nounC2/Technical
- spermatogonium/ˌspɜːmətəʊˈɡəʊniəm/A primitive male germ cell in the testis that gives rise to sperm cells.nounVery low (technical/medical)
- spermatophore/ˈspɜːmətəʊfɔː/A capsule or packet containing sperm, produced by males of certain animal species for transfer to females during reproduction.nounLow
- spermatophyte/ˈspɜːmətə(ʊ)ˌfaɪt/A seed-producing plant; a member of the major plant division that reproduces via seeds.nounC2 (Very Low)
- spermatorrhea/ˌspɜː.mə.təˈriː.ə/A medical condition involving involuntary or excessive emission of semen without orgasm.nounVery Low
- spermatorrhoea/ˌspɜːmətəˈriːə/An involuntary, excessive, or frequent discharge of semen without orgasm.nounVery Low
- spermatotoxin/ˌspɜːmətəʊˈtɒksɪn/A poison or toxin that specifically destroys sperm cells.nounVery Rare
- spermatozoid/ˌspɜːmətəˈzəʊɪd/The motile male gamete or reproductive cell in plants and some lower organisms, functionally equivalent to a sperm cell.nounVery rare
- spermatozoon/ˌspɜː.mə.təʊˈzəʊ.ɒn/The mature motile male sex cell in many organisms, including humans, that is capable of fertilizing an ovum.nounLow in general usage, high in scientific and medical contexts.
- spermicide/ˈspɜː.mɪ.saɪd/A substance, such as a cream, gel, or foam, that is designed to kill sperm cells, used as a method of contraception.nounC1
- spermidine/ˈspɜːmɪdiːn/A polyamine compound (C7H19N3) found in ribosomes and living tissues, essential for cellular growth, division, and function.nounVery Low
- spermine/ˈspɜː.miːn/A crystalline organic compound (a polyamine) originally isolated from semen, now known to be present in all eukaryotic cells and involved in cellular metabolism.nounLow/Very Technical
- spermiogenesis/ˌspɜːmɪəʊˈdʒɛnɪsɪs/The final stage of sperm cell development, in which a spermatid matures into a fully formed spermatozoon (sperm cell).nounVery Rare
- spermogonium/ˌspɜːmə(ʊ)ˈɡəʊnɪəm/In mycology and botany, a minute flask-shaped structure found in certain fungi and lichens, in which spermatia (non-motile male gametes) are produced.nounVery low (specialist scientific term)
- spermophile/ˈspɜː.mə.faɪl/A rodent of the genus Spermophilus, commonly known as a ground squirrel.nounRare
- spermophyte/ˈspɜːmə(ʊ)faɪt/A seed plant; a plant that reproduces by means of seeds.nounVery Low
Showing 10021–10040 of 15552 words.