As nouns the difference between carotin and carotid
is that carotin is a red crystallizable tasteless substance extracted from the carrot while carotid is any of a number of major arteries in the head and neck.
As an adjective carotid is
relating to these arteries.
carotin
English
Noun
(
-)
(organic compound) A red crystallizable tasteless substance extracted from the carrot.
(
Webster 1913)
carotid
Noun
(
en noun)
(anatomy) Any of a number of major arteries in the head and neck.
Synonyms
* carotid artery
Adjective
(-)
Relating to these arteries