Home › Words › F › finspinefinspinefinspine · noun — A bony structure supporting the fins in some fish.Definition from Wiktionary (CC BY-SA 3.0).EtymologyFrom fin + spine.nounA bony structure supporting the fins in some fishDefinitions & examples from Wiktionary (CC BY-SA 3.0).Words closest in meaningBy meaning, not spelling — each word's AI semantic fingerprint, nearest first.actinophore 71% match — A cartilaginous spine that supports the fin rays of fish vs finspine →actinost 63% match — A bone at the base of a paired fin (of a fish) vs finspine →branchiospinule 62% match — A branchial spinule vs finspine →acanthopterygious 61% match — Having fins in which the rays are hard and spinelike; spiny-finned. vs finspine →finnage 60% match — fins on something such as a fish. vs finspine →finned 60% match — Having fins, or a particular type of fins. vs finspine →spotfin 60% match — Any of various fish with spotted fins. vs finspine →spinose 59% match — Having a spine, or spines vs finspine →