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"embryo stage of a tapeworm," 1852, from Modern Latin scolex (plural scoleces), from Greek skolex "worm," related to skolyptesthai "to twist and turn," from PIE *skel- (3) "crooked" (see scoliosis).
scolex sco·lex (skō'lěks')
n. pl. sco·lex·es or sco·li·ces or sco·le·ces (-lĭ-sēz')
The knoblike anterior end of a tapeworm, having suckers or hooklike parts that in the adult stage serve as organs of attachment to the host.