English
epigamy
By surface analysis, epi- + -gamy.
Equivalent to epi- + -gamy
Today it means
noun A form of reproduction in marine worms in which the entire body undergoes a drastic transformation, becoming a specialized epitoke to swim to the surface, release gametes, and then die, often synchronized with moon cycles for mass spawning.
Language periods are conventional ranges, not dates for this word.
Etymograph / epigamy