English
homovalvate
From homo- + valvate.
Proto-Indo-European *sem- ‘one, whole’
Proto-Indo-European *somHós ‘same, alike’
Proto-Hellenic *homós
Ancient Greek ὁμός ‘same’
English homo-
Today it means
adj Having identical (top and bottom) valves (of a diatom)
Language periods are conventional ranges, not dates for this word.
Etymograph / homovalvate