A cup-shaped or calyx-like structure that contains or protects reproductive organs in certain hydrozoans and other marine animals.
Combining 'gono-' (reproductive) with 'calyx' (cup-shaped structure from Greek), a scientific term for specialized anatomical features in colonial animals.
This word borrowed 'calyx' from flowers to describe similar structures in sea animals—nature clearly loves reusing cup-shaped designs across completely different creatures.
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