Search the Dictionary

The removal of tissues from a healthy part, and the insertion of them in another place where there is a lesion; as, the transplantation of tissues in autoplasty. 3. (Surg.)

A stylet, usually with a triangular point, used for exploring tissues or for inserting drainage tubes, as in dropsy. [Written also trochar.]

red by Koch, a German physician, in the sputum of consumptive patients and in tuberculous tissue, and believed to be the exciting cause of tubercles and tuberculosis.

e, or growth, on any part of the body; especially, a growth produced by deposition of new tissue; a neoplasm.

A membrane, or layer of tissue, especially when enveloping an organ or part, as the eye.

is distinguished from an abscess, which has its beginning, at least, in the depth of the tissues.

specifically (Biol.), homogenous, or nearly so; -- said especially of young or embryonic tissues which have not yet undergone differentiation (see Differentiation, 3), that is, which show no visible separation into their different structural parts.

rganized; being without organic structure; specifically (Biol.), not having the different tissues and organs characteristic of living organisms, nor the power of growth and development; as, the unorganized ferments. See the Note under Ferment, n., 1.

A cord or band of fibrous tissue extending from the bladder to the umbilicus.

rge extent are cellular only. Vascular plants (Bot.), plants composed in part of vascular tissue, as all flowering plants and the higher cryptogamous plants, or those of the class Pteridophyta. Cf. Cellular plants, Cellular. -- Vascular system (Bot.), the body of associated ducts and woody fiber; the fibrovascular par…

One of the substances of which vegetable tissue is composed, differing from cellulose in its solubility in certain media.

Having the form of a vessel, or duct. Vasiform tissue (Bot.), tissue containing vessels, or ducts.

Pteridophyta, having the sporophoric plant conspicuous and consisting partly of vascular tissue, as in Ferns, Lycopods, and Equiseta, and Cellular Acrogens, or Bryophyta, having the sexual plant most conspicuous, but destitute of vascular tissue, as in Mosses and Scale Mosses. 2. Thallogens. -- Plants without distinc…

containing an insufficient amount of oxygen so as no longer to be fit for oxygenating the tissues; -- said of the blood, and opposed to arterial.

assimilation, in which proteid matter which has been transformed, and made a part of the tissue or tissue cells, is endowed with life, and thus enabled to manifest the phenomena of irritability, contractility, etc. McKendrick.

Fig.: Tissue; texture; complicated fabrication. The somber spirit of our forefathers, who wove their web of life with hardly a . . . thread of rose-color or gold. Hawthorne. Such has been the perplexing ingenuity of commentators that it is difficult to extricate the truth from the web of conjectures. W. Irving.…

Wood fern. (Bot.) See Shield fern, under Shield. -- Wood fiber. (a) (Bot.) Fibrovascular tissue. (b) Wood comminuted, and reduced to a powdery or dusty mass. -- Wood fretter (Zoöl.), any one of numerous species of beetles whose larvæ bore in the wood, or beneath the bark, of trees. -- Wood frog (Zoöl.), a common Nor…

sylvan. [R.] "Woody nymphs, fair Hamadryades." Spenser. Woody fiber. (Bot.) (a) Fiber or tissue consisting of slender, membranous tubes tapering at each end. (b) A single wood cell. See under Wood. Goodale. -- Woody nightshade. (Bot.). See Bittersweet, 3 (a). -- Woody pear (Bot.), the inedible, woody, pear-shaped fr…

A white microcrystalline nitrogenous compound, C5H4O2N4, present in muscle tissue, in the liver, spleen, pancreas, and other organs, and also in urine (in small quantities) and some urinary calculi, and in the juices of certain plants; -- so called because it leaves a yellow residue when evaporated to dryness with nitr…

A gummy substance of the pentosan class, present in woody tissue, and yielding xylose on hydrolysis; wood gum.