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A colorless liquid, C4H8O2, obtained by condensation of two molecules of acetaldehyde: CH3CHO + CH3CHO = H3CH(OH)CH2CO; also, any of various derivatives of this. The same reaction has been applied, under the name of aldol condensation, to the production of many compounds.

A name given to two species of the genus Smyrnium, formerly cultivated and used as celery now is; -- called also horse parsely.

term used in legal proceedings to connect the different names of any one who has gone by two or more, and whose true name is for any cause doubtful; as, Smith, alias Simpson.

is mainly soda with a smaller amount of potash, and usually a little lime and magnesia. Two main classes of alkali are commonly distinguished: black alkali, which may be any alkaline carbonate, but which practically consists of sodium carbonate (sal soda), which is highly corrosive and destructive to vegetation; and…

mple was to rent:" and of Judas, "He was hanged and to-burst the middle:" i. e., burst in two, or asunder. -- All along. See under Along. -- All and some, individually and collectively, one and all. [Obs.] "Displeased all and some." Fairfax. -- All but. (a) Scarcely; not even. [Obs.] Shak. (b) Almost; nearly. "The f…

All four legs of a quadruped; or the two legs and two arms of a person. To be, go, or run, on all fours (Fig.), to be on the same footing; to correspond (with) exactly; to be alike in all the circumstances to be considered. "This example is on all fours with the other." "No simile can go on all fours." Macaulay.…

A dance in moderate twofold time, invented by the French in the reign of Louis XIV.; -- now mostly found in suites of pieces, like those of Bach and Handel.

The space between two rows of compositors' stands in a printing office.

Alignment; position in a straight line, as of two planets with the sun. Whewell. The allineation of the two planets. C. A. Young.

The repetition of the same letter at the beginning of two or more words immediately succeeding each other, or at short intervals; as in the following lines: - Behemoth, biggest born of earth, upheaved His vastness. Milton. Fly o'er waste fens and windy fields. Tennyson.

Any one of two or more distinct crystalline forms of the same substance; or the substance having such forms; -- as, carbonate of lime occurs in the allomorphs calcite and aragonite.

The property of existing in two or more conditions which are distinct in their physical or chemical relations.

A small circle of the sphere parallel to the horizon; a circle or parallel of altitude. Two stars which have the same almucantar have the same altitude. See Almacantar. [Archaic] Almucanter staff, an ancient instrument, having an arc of fifteen degrees, formerly used at sea to take observations of the sun's amplitude a…

alligation. See Alligation. -- Alternate angles (Geom.), the internal and angles made by two lines with a third, on opposite sides of it. It the parallels AB, CD, are cut by the line EF, the angles AGH, GHD, as also the angles BGH and GHC, are called alternate angles. -- Alternate generation. (Biol.) See under Genera…

Offering a choice of two things.

In the manner of alternatives, or that admits the choice of one out of two things.

The quality of being alternative, or of offering a choice between two.

n alto singer. Alto clef (Mus.) the counter-tenor clef, or the C clef, placed so that the two strokes include the middle line of the staff. Moore.

One of the earths, consisting of two parts of aluminium and three of oxygen, Al2O3.

To mix, so as to make a uniform compound; to unite or combine; as, to amalgamate two races; to amalgamate one race with another. Ingratitude is indeed their four cardinal virtues compacted and amalgamated into one. Burke.