Meaning

noun the cuplike or ringlike or tubular structure of a flower which bears the sepals and stamens and calyx (as in Rosaceae)

originEtymology tree Proto-Indo-European *upó Ancient Greek ῠ̔πό (hŭpó) Ancient Greek ὑπο- (hupo-)der. English hypo- Proto-Indo-European *h₂éndʰos Proto-Hellenic *ántʰos Ancient Greek ἄνθος (ánthos) Proto-Indo-European *-om Proto-Italic *-om Latin -umder. English -ium English hypanthium From hypo- + Ancient Greek ἄνθος (ánthos) + English -ium.

Etymology from Wiktionary, CC BY-SA 3.0