metapterygium
noun
me·tap·ter·yg·i·um
mə̇¦taptə¦rijēəm
plural metapterygia
-jēə
: the posterior of the three principal basal cartilages in the pectoral fins of some fishes (as sharks and rays) compare basipterygium
Word History
Etymology
New Latin, from meta- + Greek pterygion fin, literally, small wing