spiny-headedworm

spin·y-head·ed worm (spīʹnē-hĕd'ĭd) n.

Any of various worms of the phylum Acanthocephala that live parasitically in the intestines of vertebrates and are characterized by a cylindrical, retractile proboscis that bears many rows of hooked spines. Also called acanthocephalan.

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