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Opposition; contrariety. [Obs.] Wyclif. Adversity is not without comforts and hopes. Bacon.

The positive or negative stimulus exerted by oxygen on aërobic and anaërobic bacteria. -- A`ër*o*tac"tic (#), a.

Perception by the senses; feeling; -- the opposite of anæsthesia.

To tend to by affinity or disposition. The drops of every fluid affect a round figure. Newton.

esteem, gratitude, etc. ; the malevolent affections, hatred, envy, etc.; inclination; disposition; propensity; tendency. Affection is applicable to an unpleasant as well as a pleasant state of the mind, when impressed by any object or quality. Cogan.

relationship or attraction held to exist sometimes between persons, esp. persons of the opposite sex; also, the man or woman who exerts such psychical or spiritual attraction.

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 is asserted; an assertion; a positive as, an affirmation, by the vender, of title to property sold, or of its quality.

Positive; dogmatic. [Obs.] J. Taylor. Lysicles was a little by the affirmative air of Crito. Berkeley.

or explosive, with an immediately following fricative or spirant of corresponding organic position, as pf in german Pfeffer, pepper, z (= ts) in German Zeit, time.

To front; to face in position; to meet or encounter face to face. [Obs.] All the sea-coasts do affront the Levant. Holland. That he, as 't were by accident, may here Affront Ophelia. Shak.

In a flaunting state or position. Copley.

val of a stimulus producing a primary sensation, and reproducing the primary sensation in positive, negative, or complementary form. The aftersensation may be continuous with the primary sensation or follow it after an interval.

Abreast; opposite to; facing; towards; as, against the mouth of a river; -- in this sense often preceded by over. Jacob saw the angels of God come against him. Tyndale.

o a uniform grade, or slope, by addition of material; as, streams aggrade their beds by depositing sediment.

f the insufficiency of the evidence furnished by physical and physical data, to warrant a positive conclusion (as taught by the school of Herbert Spencer); -- opposed alike dogmatic skepticism and to dogmatic theism.

Easiness of disposition. [Obs.] Chaucer.

Pertaining to fields or the country, in opposition to the city; rural; rustic; unpolished; uncouth. "Agrestic behavior." Gregory.

Indisposition or morbid affection. Pope.

Indisposition; morbid affection of the body; -- not applied ordinarily to acute diseases. "Little ailments." Landsdowne.