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The dissection of plants; vegetable anatomy.

Same as Plagiostomous.

One of the Plagiostomi.

An order of fishes including the sharks and rays; -- called also Plagiostomata.

Of or pertaining to the Plagiostomi.

See Planimeter.

Any marine gastropod belonging to Pleurotoma, and ether allied genera of the family Pleurotmidæ. The species are very numerous, especially in tropical seas. The outer lip has usually a posterior notch or slit.

An instrument for measuring the amount of force exerted by the lungs in respiration.

See Spirometry.

An order of Bryozoa of which Rhabdopleura is the type. See Rhabdopleura.

Having more than one atom in the molecule; consisting of several atoms.

A division of trematode worms having more two suckers. Called also Polystomea and Polystoma.

Having many mouths.

Subdivided into many distinct subordinate parts, which, however, not being jointed to the petiole, are not true leaflets; -- said of leaves. Henslow.

A division into many members. F. Bowen.

Circumcision. Dunglison.

An incision into the rectum, as for the division of a stricture.

That portion of the head of an annelid situated in front of the mouth. -- Pro*sto"mi*al, a.

The first martyr; the first who suffers, or is sacrificed, in any cause; -- applied esp. to Stephen, the first Christian martyr.

The second segment of one of the Gregarinæ.