a cocklebur, Xanthium spinosum, introduced into North America from Europe.
noun 1. any of several dogfish sharks of the genus Squalus, having a spine in front of each of the two dorsal fins, especially S. acanthias, inhabiting Atlantic coastal waters.
noun 1. a rat-sized rodent, Platacanthomys lasiurus, native to rocky hills of southern India, having reddish-brown fur and sharp, flat spines.
[spahy-nee-find] /ˈspaɪ niˈfɪnd/ adjective, Ichthyology. 1. having fins with sharp bony rays, as an acanthopterygian. spiny-finned adjective 1. (of certain fishes) having fins that are supported by stiff bony spines See also acanthopterygian Compare soft-finned
- Spiny-headed worm
[spahy-nee-hed-id] /ˈspaɪ niˌhɛd ɪd/ noun 1. any of a small group of endoparasites of the phylum Acanthocephala, as larvae parasitic in insects and crustaceans and as adults in various vertebrates. spiny-headed worm spin·y-head·ed worm (spī’nē-hěd’ĭd) n. See Acanthocephala. spiny-headed worm (spī’nē-hěd’ĭd) See acanthocephalan.