Part 121

A`ër*o*stat"ics (&?;), n. The science that treats of the equilibrium of elastic fluids, or that of bodies sustained in them. Hence it includes aëronautics.

A`ër*os*ta"tion (&?;), n. [Cf. F. aérostation the art of using aërostats.] 1. Aërial navigation; the art of raising and guiding balloons in the air.

2. The science of weighing air; aërostatics. [Obs.]

Æ*ru"gi*nous (&?;), a. [L. aeruginosus, fr. aerugo rust of copper, fr. aes copper: cf. F. érugineux.] Of the nature or color of verdigris, or the rust of copper.

||Æ*ru"go (&?;), n. [L. aes brass, copper.] The rust of any metal, esp. of brass or copper; verdigris.

Ae"ry (&?;), n. An aerie.

A"ër*y (&?;), a. [See Air.] Aërial; ethereal; incorporeal; visionary. [Poetic] M. Arnold.

Æs`cu*la"pi*an (&?;), a. Pertaining to Æsculapius or to the healing art; medical; medicinal.

Æs`cu*la"pi*us (&?;), n. [L. Aesculapius, Gr. &?;.] (Myth.) The god of medicine. Hence, a physician.

Æs"cu*lin (&?;), n. Same as Esculin.

Æ*so"pi*an, E*so"pi*an (&?;), a. [L. Aesopius, from Gr. &?;, fr. the famous Greek fabulist Æsop (&?;).] Of or pertaining to Æsop, or in his manner.

Æ*sop"ic, E*sop"ic (&?;), a. [L. Aesopicus, Gr. &?;.] Same as Æsopian.

||Æs*the"si*a (&?;), n. [Gr. &?; sensation, fr. &?; to perceive.] (Physiol.) Perception by the senses; feeling; -- the opposite of anæsthesia.

Æs*the`si*om"e*ter, Es*the`si*om"e*ter (&?;), n. [Gr. &?; (see Æsthesia) + -meter.] An instrument to measure the degree of sensation, by determining at how short a distance two impressions upon the skin can be distinguished, and thus to determine whether the condition of tactile sensibility is normal or altered.

||Æs*the""sis (&?;), n. [Gr. &?;.] Sensuous perception. [R.] Ruskin.

Æs`the*sod"ic (&?;), a. [Gr. &?; sensation + &?; a way; cf. F. esthésodique.] (Physiol.) Conveying sensory or afferent impulses; — said of nerves.

Æs"thete (&?;), n. [Gr. &?; one who perceives.] One who makes much or overmuch of æsthetics. [Recent]

{Æs*thet"ic (&?;), Æs*thet"ic*al (&?;),} a. Of or Pertaining to æsthetics; versed in æsthetics; as, æsthetic studies, emotions, ideas, persons, etc.

-- Æs*thet"ic*al*ly, adv.

Æs`the*ti"can (&?;), n. One versed in æsthetics.

Æs*thet"i*cism (&?;), n. The doctrine of æsthetics; æsthetic principles; devotion to the beautiful in nature and art. Lowell.

Æs*thet"ics, Es*thet"ics (&?;; 277), n. [Gr. &?; perceptive, esp. by feeling, fr. &?; to perceive, feel: cf. G. ästhetik, F. esthétique.] The theory or philosophy of taste; the science of the beautiful in nature and art; esp. that which treats of the expression and embodiment of beauty by art.

Æs`tho-phys`i*ol"o*gy(&?;), n. [Gr. &?; to perceive + E. physiology.] The science of sensation in relation to nervous action. H. Spenser.

Æs"ti*val (&?;), a. [L. aestivalis, aestivus, fr. aestas summer.] Of or belonging to the summer; as, æstival diseases. [Spelt also estival.]

Æs"ti*vate (&?;), v. i. [L. aestivare, aestivatum.] 1. To spend the summer.

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

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.