Relating to or characteristic of the carotid artery; an archaic or rare variant of carotic.
From carotid plus -ean (variant of -ian, meaning 'relating to'). An older formation that never became standard compared to 'carotic' or 'carotidal.'
The '-ean' suffix gives 'carotidean' a more classical, medical feel than simpler forms—doctors experimented with different word formations before settling on standard terminology.
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