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of fishes having some of the rays of the dorsal, ventral, and anal fins unarticulated and spinelike, as the perch.

Having fins in which the rays are hard and spinelike; spiny- finned.

One of the needlelike or bristlelike spines or prickles of some animals and plants; also, a needlelike crystal.

Having straight projecting spines.

Of or pertaining to ambulacra; avenuelike; as, the ambulacral ossicles, plates, spines, and suckers of echinoderms.

Spineless, as certain fishes.

clinal vertebra (Anat.), one of the dorsal vertebræ, which in many animals has an upright spine toward which the spines of the neighboring vertebræ are inclined.

A division of Amphineura in which the body is naked or covered with slender spines or setæ, but is without shelly plates.

Having a slender, sharp, or spinelike tip.

In human beings, the hinder part of the body, extending from the neck to the end of the spine; in other animals, that part of the body which corresponds most nearly to such part of a human being; as, the back of a horse, fish, or lobster.

The column of bones in the back which sustains and gives firmness to the frame; the spine; the vertebral or spinal column.

A variety of spinel ruby, of a pale rose red, or inclining to orange. See Spinel.

A small fish, the three-spined stickleback.

Batrachidæ, a family of marine fishes, including the toadfish. Some have poisonous dorsal spines.

The fifteen-spined (Gasterosteus spinachia).

Having two spines.

enus (Rhamnus) of shrubs or trees. The shorter branches of some species terminate in long spines or thorns. See Rhamnus. Sea buckthorn, a plant of the genus Hippophaë.

(Tribulus) of the order Zygophylleæ, having a hard several-celled fruit, armed with stout spines, and resembling the military instrument of the same name. The species grow in warm countries, and are often very annoying to cattle.

A variety of spinel, of a dark color, found at Candy, in Ceylon.

The name belongs for the most part to ruby sapphire, though it has been also given to red spinel and garnet.