Word.ws English Dictionary

placoid

placoid adjective: platelike; having irregular, platelike, bony scales, often bearing spines; pertaining to the placoid fish.

Adjective

placoid (not comparable)

  1. Platelike; having irregular, platelike, bony scales, often bearing spines; pertaining to the placoid fish
    • What about the carp? He regarded the two placoid shapes with doubt.1979, Cormac McCarthy, Suttree, Random House, page 68

Noun

placoid (plural placoids)

  1. Such a scale
  2. Any fish having placoid scales, such as the sharks
  3. A placodioid lichen

Forms of placoid

pluralplacoids

Origin of placoid

From Ancient Greek πλάξ (pláx, stem plak-) + -oid.

Questions about placoid

What does placoid mean?
Placoid means platelike; having irregular, platelike, bony scales, often bearing spines; pertaining to the placoid fish.
What part of speech is placoid?
Placoid can be an adjective or a noun.

Words near placoid in the dictionary

  1. placodontids
  2. placodontoid
  3. placodontoids
  4. placodonts
  5. placoganoid
  6. placoid
  7. placoidal
  8. placoidian
  9. placoidians
  10. placoids
  11. placophobia

Source and license

Adapted from Wiktionary: placoid (page history and authors). Text available under the Creative Commons Attribution-ShareAlike 4.0 license. Word.ws reformatted the entry and added links. Wiktionary data of 2026-09-02.

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