Hy·pan·thi·um n.; pl. L. Hypanthia E. Hypanthiums Bot. A fruit consisting in large part of a receptacle, enlarged below the calyx, as in the Calycanthus, the rose hip, and the pear.
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hypanthium
n : the cuplike or ringlike or tubular structure of a flower
which bears the sepals and stamens and calyx (as in
Rosaceae) [syn: floral cup, calyx tube]
[also: hypanthia (pl)]