2. (Zoöl.) To pass the summer in a state of torpor.

[Spelt also estivate.]

(Æs`ti*va"tion) n.

1. (Zoöl.) The state of torpidity induced by the heat and dryness of summer, as in certain snails; — opposed to hibernation.

2. (Bot.) The arrangement of the petals in a flower bud, as to folding, overlapping, etc.; prefloration. Gray.

[Spelt also estivation.]

(Æs"tu*a*ry) 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 ('a priv. + custom) + marriage.] (Bot.) Propagated in an unusual way; cryptogamous.

(Æ"ther) n. See Ether.

Æthiops mineral
(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.

The steep where Fame's proud temple shines afar.

(A*feard") p. a. [OE. afered, AS. af&aemacrred, p. p. of af&aemacrran to frighten; a- (cf. Goth. us- , Ger. er-, orig. meaning out) + f&aemacrran to frighten. See Fear.] Afraid. [Obs.]

Be not afeard; the isle is full of noises.

(||A"fer) n. [L.] The southwest wind. Milton.

  By PanEris using Melati.

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