Webster's Revised Unabridged Dictionary -- Volume AB

Æs"tu·a·ry (?; 135), n. & a. See Estuary.

Æs"tu·ous (?), a. [L. aestuosus, fr. aestus fire, glow.] Glowing; agitated, as with heat.

A·ë`the·og"a·mous (?), a. [Gr. ? unusual (α priv. + ? custom) + ? marriage.] (Bot.) Propagated in an unusual way; cryptogamous.

Æ"ther (?), n. See Ether.

Æ"thi·ops min"er·al (?). (Chem.) Same as Ethiops mineral. [Obs.]

Æth"o·gen (?), n. [Gr. ? fire, light + -gen.] (Chem.) A compound of nitrogen and boro?, which, when heated before the blowpipe, gives a brilliant phosphorescent; boric nitride.

Æ"thri·o·scope (?), n. [Gr. ? clear + ? to observe.] An instrument consisting in part of a differential thermometer. It is used for measuring changes of temperature produced by different conditions of the sky, as when clear or clouded.

Æ`ti·o·log"ic·al (?), a. Pertaining to ætiology; assigning a cause.

-- Æ`ti·o·log"ic·al·ly, adv.

Æ`ti·ol"o·gy (?), n. [L. aetologia, Gr. ?; ? cause + ? description: cf. F. étiologie.]

1. The science, doctrine, or demonstration of causes; esp., the investigation of the causes of any disease; the science of the origin and development of things.

2. The assignment of a cause.

A`ë·ti"tes (?), n. [L., fr. Gr. ? (sc. ?) stone, fr. ? eagle.] See Eaglestone.

A·far" (?), adv. [Pref. a- (for on or of) + far.] At, to, or from a great distance; far away; -- often used with from preceding, or off following; as, he was seen from afar; I saw him afar off.