"full bloom, period or act of blooming, time that the flower is expanded," 1811, from Greek anthesis, noun of action from antheein "to blossom," from anthos "flower" (see anther).
Entries linking to anthesis
anther n.
1550s, "medical extract of flowers," from French anthère or Modern Latin anthera "a medicine extracted from a flower," from Greek anthera, fem. of antheros "flowery, blooming," from anthos "flower," from PIE root *andh- "to bloom" (source also of Sanskrit andhas "herb," Armenian and "field," Middle Irish ainder "young girl," Welsh anner "young cow"). The botanical sense of "polliniferous part of a stamen" attested by 1791.