mastigium

[ ma-stij-ee-uh m ]
/ mæˈstɪdʒ i əm /

noun, plural mas·tig·i·a [ma-stij-ee-uh] /mæˈstɪdʒ i ə/.

an extensible, lashlike, anal organ in certain caterpillars.

Origin of mastigium

1895–1900; < New Latin < Greek mastīgion, diminutive of mástix whip