Answer: apophyses

AnswerCrossword Clue
apophysesA natural protuberance from a bone, or inside the shell or exoskeleton of a sea urchin or insect, for the attachment of muscles
apophysesAPOPHYSIS, an expanded or projecting part of an organism, esp of bone
apophysesA small offshoot extending from an igneous intrusion into the surrounding rock
apophysesA swelling at the base of the sporangium in some mosses