placoid

adjective
plac·​oid | \ ˈpla-ˌkȯid How to pronounce placoid (audio) \

Definition of placoid

: of, relating to, or being a scale of dermal origin with an enamel-tipped spine characteristic of the elasmobranchs

First Known Use of placoid

1842, in the meaning defined above

History and Etymology for placoid

Greek plak-, plax flat surface

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Time Traveler for placoid

Time Traveler

The first known use of placoid was in 1842

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Dictionary Entries Near placoid

Placoganoidei

placoid

placoidal

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Cite this Entry

“Placoid.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/placoid. Accessed 9 Dec. 2021.

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