One of the mysteries of the English language finally explained.
(of certain sponges) composed of a horny substance.
- ‘This contrasts with temperate and especially sub-tropical and tropical latitudes where keratose sponges can be common.’
- ‘I have taken pictures of them feeding on the yellow keratose sponges.’
Mid 19th century: from Greek keras, kerat- ‘horn’ + -ose.
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