Relating to or affected by a rattling or shaking movement, or pertaining to a rattle-like sound.
From Greek 'kroton' (a rattle) or related to Latin 'crotālum,' words describing rattling instruments, with the adjective suffix '-al'.
The word 'crotal' connects to crotel, a tiny bell used in medieval times, which is why crotals appear on horse tack and clothing—they're the original jingle bells that announced medieval nobility passing by on the road.
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