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Having the quality of excreting, or throwing off excrementitious matter.

actile vacuole (Zoöl.), a pulsating cavity in the interior of a protozoan, supposed to be excretory in function. There may be one, two, or more.

That which is egested or thrown off from the body by the various excretory channels; excrements; -- opposed to ingesta.

rmiform mass on the dorsal side of the testicle, composed of numerous convolutions of the excretory duct of that organ. -- Ep`i*did"y*mal, a.

The part of the epididymis; or the corresponding part of the excretory duct of the testicle, which is derived from the Wolffian body.

tes which is not of the nature of a real heart, especially one of those pertaining to the excretory system.

kidneys; in the region of the kidneys. Renal calculus (Med.), a concretion formed in the excretory passages of the kidney. -- Renal capsules or glands, the suprarenal capsules. See under Capsule. -- Renal casts, Renal colic. (Med.) See under Cast, and Colic.

g, and connecting the oral ambulacral ring with the madreporic tubercle. It appears to be excretory in function. -- Sand cock (Zoöl.), the redshank. [Prov. Eng.] -- Sand collar. (Zoöl.) Same as Sand saucer, below. -- Sand crab. (Zoöl.) (a) The lady crab. (b) A land crab, or ocypodian. -- Sand crack (Far.), a crack e…

cyst (Med.), a cyst formed by distention of a sebaceous gland, due to obstruction of its excretory duct. -- Sebaceous glands (Anat.), small subcutaneous glands, usually connected with hair follicles. They secrete an oily semifluid matter, composed in great part of fat, which softens and lubricates the hair and skin.…

ning to the segmental organs. Segmental duct (Anat.), the primitive duct of the embryonic excretory organs which gives rise to the Wolffian duct and ureter; the pronephric duct. -- Segmental organs. (a) (Anat.) The embryonic excretory organs of vertebrates, consisting primarily of the segmental tubes and segmental duc…

eferens; pl. Vasa deferentia. Etym: [L. vas vessel + deferens carrying down.] (Anat.) The excretory duct of a testicle; a spermatic duct.

One of a system of tubular excretory organs having external openings, found in many invertebrates. They are believed to be analogous in function to the kidneys of vertebrates. See Illust. under Trematodea, and Sporocyst.