Keyhole urchin

Definition of Keyhole urchin

(Zool.) any one of numerous clypeastroid sea urchins, of the genera Melitta, Rotula, and Encope; - so called because they have one or more perforations resembling keyholes.

See also: Keyhole

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Keverchief
Kex
Key
Key bed
Key bolt
Key bugle
Key fruit
Key of a position
Key seat
Key tone
Key way
Key wrench
Key-cold
Keyage
Keyboard
Keyed
Keyed bugle
Keyhole
Keyhole limpet
Keyhole saw
-Keyhole urchin-
keyless
Keynes
Keynesian
Keynesianism
Keynote
Keyseat
Keystone
Keystone State
Keyway
keyword
Khaki
Khaliff
Khalka
Khamsin
Khan
Khanate
Kharkov
Khaya
Khedive
Khenna
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