spermatium noun. [spǝ:'meɪʃɪǝm] Pl. -tia [-ʃɪǝ]. M19.
[mod. Latin from Greek spermation dim. of sperma SPERM: see -IUM.]
Botany. A non-motile cell acting as a male gamete in fungi lacking antheridia, esp. rust fungi and certain ascomycetes. In red algae, a non-flagellated male gamete.

■ spermatiophore noun (Mycology) a special hypha bearing spermatia L19.

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