Meaning

noun veins in the neck that return blood from the head

noun a vital part that is vulnerable to attack

adjective relating to or located in the region of the neck or throat

originLate 16th century borrowing from Late Latin jugulāris, from jugulum (“the collarbone; the hollow part of the neck above the collarbone; the throat”) + -āris (“-ar, -ary”, adjectival suffix); equivalent to jugulum + -ar.

Etymology from Wiktionary, CC BY-SA 3.0