c. 1600, "suitable for garlands;" 1640s, "pertaining to a crown, resembling a crown," both older senses now obsolete; from Latin coronarius "of or belonging to a wreath, presenting a garland-like grownth," from corona "wreath, crown" (see crown (n.)).
Anatomical use is from 1670s in reference to the blood vessels that supply the muscular substance of the heart and surround it like a crown. Coronary artery is recorded from 1741. As a noun meaning "a blockage of the flow of blood to the heart caused by a clot in a coronary artery," it dates from 1955, short for coronary thrombosis.
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