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An instrument for ascertaining the weight or density of air and gases.

Of or pertaining to aërometry; as, aërometric investigations.

Pertaining to aëronautics, or aërial sailing.

Of or pertaining to aërostatics; pneumatic.

The science that treats of the equilibrium of elastic fluids, or that of bodies sustained in them. Hence it includes aëronautics.

Pertaining to Æsculapius or to the healing art; medical; medicinal.

Of or pertaining to Æsop, or in his manner.

Of or Pertaining to æsthetics; versed in æsthetics; as, æsthetic studies, emotions, ideas, persons, etc. -- Æs*thet"ic*al*ly, adv.

The state of torpidity induced by the heat and dryness of summer, as in certain snails; -- opposed to hibernation.

Pertaining to ætiology; assigning a cause. -- Æ`ti*o*log"ic*al*ly, adv.

A material object (vaguely designated). A certain affair of fine red cloth much worn and faded. Hawthorne.

Of or pertaining to the affections; as, affectional impulses; an affectional nature.

Pertaining to or exciting emotion; affectional; emotional. Rogers.

To assess or reduce, as an arbitrary penalty or amercement, to a certain and reasonable sum. Amercements . . . were affeered by the judges. Blackstone.

The establishment or ascertaining of parentage; the assignment of a child, as a bastard, to its father; filiation.

To assert positively; to tell with confidence; to aver; to maintain as true; -- opposed to deny. Jesus, . . . whom Paul affirmed to be alive. Acts xxv. 19.

that which denies; an affirmative proposition; that side of question which affirms or maintains the proposition stated; -- opposed to Ant: negative; as, there were forty votes in the affirmative, and ten in the negative. Whether there are such beings or not, 't is sufficient for my purpose that many have believed the a…

Of or pertaining to Afghanistan.

Of or pertaining to Africa. African hemp, a fiber prerared from the leaves of the Sanseviera Guineensis, a plant found in Africa and India. -- African marigold, a tropical American plant (Tagetes erecta). -- African oak or African teak, a timber furnished by Oldfieldia Africana, used in ship building. African violet…

The impression of a vivid sensation retained by the retina of the eye after the cause has been removed; also extended to impressions left of tones, smells, etc.