Where does “gymnospermic” come from?

gymnospermic (English) comes from English gymnosperm, from Ancient Greek σπέρμα, from Proto-Hellenic *spérmə.

Ancestry of “gymnospermic”, step by step

gymnospermic traces back through two separate lines of ancestry.

via English gymnosperm

StepLanguageWordMeaning
1EnglishgymnospermAny plant such as a conifer whose seeds are not...
2Ancient Greekσπέρμαseed; semen, sperm; seed-time, sowing
3Proto-Hellenic*spérmə

via English ic

StepLanguageWordMeaning
1Englishicrelated or pertaining to; having the character of
Every word from Proto-Hellenic *spérməEvery word from Ancient Greek σπέρμαEvery word from English gymnosperm
gymnospermic — Etymology, Origin & Word History | Etymology Explorer