Definition of ad-

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Ad- () As a prefix ad- assumes the forms ac-, af-, ag-, al-, an-, ap-, ar-, as-, at-, assimilating the d with the first letter of the word to which ad- is prefixed. It remains unchanged before vowels, and before d, h, j, m, v. Examples: adduce, adhere, adjacent, admit, advent, accord, affect, aggregate, allude, annex, appear, etc. It becomes ac- before qu, as in acquiesce..

Lern More About Ad-

Siren :: Siren (n.) Any long, slender amphibian of the genus Siren or family Sirenidae, destitute of hind legs and pelvis, and having permanent external gills as well as lungs. They inhabit the swamps, lagoons, and ditches of the Southern United States. The more common species (Siren lacertina) is dull lead-gray in color, and becames two feet long..
Tread-softly :: Tread-softly (n.) Spurge nettle. See under Nettle.
Grig :: Grig (n.) The broad-nosed eel. See Glut.
Mad-headed :: Mad-headed (a.) Wild; crack-brained.
Hessite :: Hessite (n.) A lead-gray sectile mineral. It is a telluride of silver.
Brob :: Brob (n.) A peculiar brad-shaped spike, to be driven alongside the end of an abutting timber to prevent its slipping..
Tennantite :: Tennantite (n.) A blackish lead-gray mineral, closely related to tetrahedrite. It is essentially a sulphide of arsenic and copper..
Thallium :: Thallium (n.) A rare metallic element of the aluminium group found in some minerals, as certain pyrites, and also in the lead-chamber deposit in the manufacture of sulphuric acid. It is isolated as a heavy, soft, bluish white metal, easily oxidized in moist air, but preserved by keeping under water. Symbol Tl. Atomic weight 203.7..
Woad-waxen :: Woad-waxen (n.) A leguminous plant (Genista tinctoria) of Europe and Russian Asia, and adventitious in America; -- called also greenwood, greenweed, dyer's greenweed, and whin, wood-wash, wood-wax, and wood-waxen..
Tempered :: Tempered (a.) Brought to a proper temper; as, tempered steel; having (such) a temper; -- chiefly used in composition; as, a good-tempered or bad-tempered man; a well-tempered sword..
Petasus :: Petasus (n.) The winged cap of Mercury; also, a broad-brimmed, low-crowned hat worn by Greeks and Romans..
Wide-awake :: Wide-awake (n.) A broad-brimmed, low-crowned felt hat..
Laminarite :: Laminarite (n.) A broad-leafed fossil alga.
Tatouay :: Tatouay (n.) An armadillo (Xenurus unicinctus), native of the tropical parts of South America. It has about thirteen movable bands composed of small, nearly square, scales. The head is long; the tail is round and tapered, and nearly destitute of scales; the claws of the fore feet are very large. Called also tatouary, and broad-banded armadillo..
Broad-leafed :: Broad-leafed (a.) Having broad, or relatively broad, leaves..
Eyed :: Eyed (a.) Heaving (such or so many) eyes; -- used in composition; as sharp-eyed; dull-eyed; sad-eyed; ox-eyed Juno; myriad-eyed.
Leadwort :: Leadwort (n.) A genus of maritime herbs (Plumbago). P. Europaea has lead-colored spots on the leaves, and nearly lead-colored flowers..
Whin :: Whin (n.) Woad-waxed.
Flat :: Flat (n.) A straw hat, broad-brimmed and low-crowned..
Dead-hearted :: Dead-hearted (a.) Having a dull, faint heart; spiritless; listless..
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