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A bladderlike vessel; a membranous cavity; a cyst; a cell. Specifically: --(a) (Bot.)

A larval entozoön in the form of a subglobular or oval vesicle, or hy datid, filled with fluid, sometimes found in the tissues of man and the lower animals; -- so called from the absence of a head or visible organs on the vesicle. These cysts are the immature stages of certain tapeworms. Also applied to similar cysts o…

ds, and reptiles, -- in mammals serving to connect the fetus with the parent; the urinary vesicle.

A small depression, sac, or vesicle, as the socket of a tooth, the air cells of the lungs, the ultimate saccules of glands, etc.

The colored ring around the nipple, or around a vesicle or pustule.

. It is obtained from the balm of Gilead (or balsam) fir (Abies balsamea) by breaking the vesicles upon the trunk and branches. See Balm.

Any vesicle or blister, especially if filled with air, or a thin, watery fluid.

A genus (Utricularia) of aquatic or marshy plants, which usually bear numerous vesicles in the divisions of the leaves. These serve as traps for minute animals. See Ascidium.

The germinal vesicle.

A large vesicle or bulla, usually containing a serous fluid; a blister; a bubble, as in water, glass, etc. Arsenic abounds with air blebs. Kirwan.

A vesicle of the skin, containing watery matter or serum, whether occasioned by a burn or other injury, or by a vesicatory; a collection of serous fluid causing a bladderlike elevation of the cuticle. And painful blisters swelled my tender hands. Grainger.

simply the anterior termination of the spinal cord, and is developed from three embryonic vesicles, whose cavities are connected with the central canal of the cord; the cavities of the vesicles become the central cavities, or ventricles, and the walls thicken unequally and become the three segments, the fore-, mid-, an…

A bleb; a vesicle, or an elevation of the cuticle, containing a transparent watery fluid.

A purse; also, a vesicle; a pod; a hull. [Obs.] Holland.

A contractile cell or vesicle containing liquid pigment and capable of changing its form or size, thus causing changes of color in the translucent skin of such animals as possess them. They are highly developed and numerous in the cephalopods.

is. Croupous pneumonia, pneumonia attended with deposition of fibrinous matter in the air vesicles of the lungs; ordinary acute pneumonia.

A minute vesicle in a red seaweed, which contains the reproductive spores.

g and intensifying sounds so as to assist the hearing of a partially deaf person. -- Ear vesicle (Zoöl.), a simple auditory organ, occurring in many worms, mollusks, etc. It consists of a small sac containing a fluid and one or more solid concretions or otocysts. -- Rose ear (in dogs), an ear which folds backward and…

e of the skin, characterized by the presence of redness and itching, an eruption of small vesicles, and the discharge of a watery exudation, which often dries up, leaving the skin covered with crusts; -- called also tetter, milk crust, and salt rheum.

Of or pertaining to an embryo; embryonal; rudimentary. Embryonic sac or vesicle (Bot.), the vesicle within which the embryo is developed in the ovule; -- sometimes called also amnios sac, and embryonal sac.