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Crinoidal. -- n.

Of pertaining to crinoids; consisting of, or containing, crinoids.

A large class of Echinodermata, including numerous extinct families and genera, but comparatively few living ones. Most of the fossil species, like some that are recent, were attached by a jointed stem. See Blastoidea, Cystoidea, Comatula.

One of the Crinoidea.

That order of the Crinoidea which includes most of the living and many fossil forms, having jointed arms around the margin of the oral disk; -- also called Brachiata and Articulata. See Illusts. under Comatula and Crinoidea.

A suborder of Crinoidea found chiefly in the Paleozoic rocks.

An immature comatula when it is still attached by a stem, and thus resembles a Pentacrinus.

A subdivision of the Crinoidea.

A joint of the cirri of the Crinoidea; a joint or segment of an arthropod appendage.

One of the divisions of Crinoidea found fossil in paleozoic rocks; pentremites. They are so named on account of their budlike form.

A division of the Crinoidea, including those furnished with long jointed arms. See Crinoidea.

A crinoid of the genus Antedon and related genera. When young they are fixed by a stem. When adult they become detached and cling to seaweeds, etc., by their dorsal cirri; -- called also feather stars.

Any crinoid of the genus Antedon or allied genera.

An order of Crinoidea, mostly fossils of the Paleozoic rocks. They were usually roundish or egg-shaped, and often unsymmetrical; some were sessile, others had short stems.

A fossil crinoid, esp. one belonging to, or resembling, the genus Encrinus. Sometimes used in a general sense for any crinoid.

A genus of fossil encrinoidea, from the Mesozoic rocks.

A fossil joint of a crinoid stem.

A fossil crinoid of the genus Marsupites, resembling a purse in form.

An order of curious parasitic worms found on crinoids. The body is short and disklike, with four pairs of suckers and five pairs of hook-bearing parapodia on the under side.

One of the bifurcations of the brachial plates of a crinoid.