ˌärməˌdiləˈdīəˌdē noun plural
Usage: capitalized
Etymology: New Latin, from Armadillidium, type genus (from Armadillo (II) + -idium ) + -idae; from the habit of rolling the body up into a ball when touched
: a cosmopolitan family (type genus Armadillidium ) of terrestrial isopods having arched bodies that can be rolled into a ball and including all the pill bugs