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Webster’s Dictionary (1828)

98,828 entries. Headwords are matched first, then definition text.

2,072 words match “RAD”

RADIOTELEGRAM n.

A message transmitted by radiotelegraph.

RADIOTELEGRAPH n.

A wireless telegraph.

RADIOTELEGRAPHIC a.

Of or pertaining to radiotelegraphy; employing, or used or employed in, radiotelegraphy.

RADIOTELEGRAPHY n.

Telegraphy using the radiant energy of electrical (Hertzian) waves; wireless telegraphy; -- the term adopted for use by the Radiotelegraphic Convention of 1912.

RADIOTELEPHONE n.

A wireless telephone. -- Ra`di*o*te*leph"o*ny (#), n.

RADIOTHERAPY n.

Treatment of disease by means of Röntgen rays or other forms of radioactivity.

RADIOTHORIUM n.

A radioactive substance apparently formed as a product from thorium.

RADIOUS a. 2 definitions

Radiating; radiant. [Obs.] G. Fletcher.

fleshy root of a well-known cruciferous plant (Paphanus sativus); also, the whole plant. Radish fly (Zoöl.), a small two-winged fly (Anthomyia raphani) whose larvæ burrow in radishes. It resembles the onion fly. -- Rat-tailed radish (Bot.), an herb (Raphanus caudatus) having a long, slender pod, which is sometimes ea…

An intensely radioactive metallic element found (combined) in minute quantities in pitchblende, and various other uranium minerals. Symbol, Ra; atomic weight, 226.4. Radium was discovered by M. and Mme. Curie, of Paris, who in 1902 separated compounds of it by a tedious process from pitchblende. Its compounds color fla…

RADIUS n. 6 definitions

Radiating organs, or color-markings, of the radiates.

RADIUS VECTOR n. 2 definitions

A straight line (or the length of such line) connecting any point, as of a curve, with a fixed point, or pole, round which the straight line turns, and to which it serves to refer the successive points of a curve, in a system of polar coördinates. See Coördinate, n.

RADIX n. 3 definitions

A primitive, from which spring other words; a radical; a root; an etymon.

The chitinous ribbon bearing the teeth of mollusks; -- called also lingual ribbon, and tongue. See Odontophore.

Rasplike; as, raduliform teeth.

A material used for grinding, as emery, sand, powdered glass, etc.

ABRADE v. 2 definitions

To rub or wear off; to waste or wear away by friction; as, to abrade rocks. Lyell.

Put in dread; afraid. [Obs.] Chaucer.

To bring, or tend to bring, to a uniform grade, or slope, by addition of material; as, streams aggrade their beds by depositing sediment.

A tropical wind blowing steadily in a direction opposite to the trade wind.