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Of or belonging to the summer; as, æstival diseases. [Spelt also estival.]

To pass the summer in a state of torpor. [Spelt also estivate.]

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

A compound of nitrogen and boro

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.

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.

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. Beattie.

Afraid. [Obs.] Be not afeard; the isle is full of noises. Shak.

The quality of being affable; readiness to converse; courteousness in receiving others and in conversation; complaisant behavior. Affability is of a wonderful efficacy or power in procuring love. Elyot

ich is done or is to be done; matter; concern; as, a difficult affair to manage; business of any kind, commercial, professional, or public; -- often in the plural. "At the head of affairs." Junius. "A talent for affairs." Prescott.

To influence or move, as the feelings or passions; to touch. A consideration of the rationale of our passions seems to me very necessary for all who would affect them upon solid and pure principles.

e or exhibit what is not natural or real; false display; artificial show. "An affectation of contempt." Macaulay. Affectation is an awkward and forced imitation of what should be genuine and easy, wanting the beauty that accompanies what is natural what is natural. Locke.

Made up of terms involving different powers of the unknown quantity; adfected; as, an affected equation.

One who affects, assumes, pretends, or strives after. "Affecters of wit." Abp. Secker.

The quality or state of being affectible. [R.]

The act of affecting or acting upon; the state of being affected.

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

Proceeding from affection; indicating love; tender; as, the affectionate care of a parent; affectionate countenance, message, language.

The quality of being affectionate; fondness; affection.

Full of passion or emotion; earnest. [Obs.] -- Af*fec"tu*ous*ly, adv. [Obs.] Fabyan.