IPA: /ænˈθiːsɪs/
KK: /ænˈθiːsɪs/
The time when a flower is completely open and able to reproduce.
The anthesis of the rose occurs in late spring, attracting many pollinators.
Anthesis is formed from "anthos" (from Greek, meaning flower) and "-esis" (meaning process or action). The word refers to the process of flowering or the period during which a flower is fully open.
Think of 'anthos' meaning flower, and remember that 'anthesis' describes the process of a flower blooming.