book gill

noun

: a gill found in the horseshoe crabs that consists of membranous folds arranged like the leaves of a book

Word History

First Known Use

1897, in the meaning defined above

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Rhymes for book gill

• anthill
• backfill
• bluegill
• crossbill
• distil
• distill
• downhill
• dunghill
• foothill
• fulfil
• fulfill
• goodwill