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A kind of embryo of certain hydroids (Tubularia), having a stellate form.

ving heat. -- Ad`i*a*bat`ic*al*ly, adv. Adiabatic line or curve, a curve exhibiting the variations of pressure and volume of a fluid when it expands without either receiving or giving out heat. Rankine.

The observation of the state and variations of the atmosphere.

A soft, resinous wood (Aquilaria Agallocha) of highly aromatic smell, burnt by the orientals as a perfume. It is called also agalwood and aloes wood. The name is also given to some other species.

A fucus or seaweed much used in the East for soups and jellies; Ceylon moss (Gracilaria lichenoides).

s. Cf. man-kind, heir-loom, war-like, which are agglutinative compounds. The Finnish, Hungarian, Turkish, the Tamul, etc., are agglutinative languages. R. Morris. Agglutinative languages preserve the consciousness of their roots. Max Müller.

those places where the magnetic needle points to the true north; the line of no magnetic variation. There is one such line in the Western hemisphere, and another in the Eastern hemisphere.

hymn or song, or even to plain prose, or played upon an instrument; a melody; a tune; an aria.

A group of soft-bodied Alcyonaria, of which Alcyonium is the type. See Illust. under Alcyonaria.

Of or pertaining to the Alcyonaria.

A genus of fleshy Alcyonaria, its polyps somewhat resembling flowers with eight fringed rays. The term was also formerly used for certain species of sponges.

Like or pertaining to the Alcyonaria. -- n.

Same as Alfilaria.

fixed star, in Medusa's head, in the constellation Perseus, remarkable for its periodic variation in brightness.

Variability in chemical constitution without variation in crystalline form.

ke observations of the sun's amplitude at the time of its rising or setting, to find the variation of the compass.

The quality of being alterable; variableness; alterability.

Constancy during a certain period, or regularly at stated intervals; invariably; uniformly; -- opposed to sometimes or occasionally. He always rides a black galloway. Bulwer.

The species resemble edible mushrooms, and are frequently mistaken for them. Amanita muscaria, syn. Agaricus muscarius, is the fly amanita, or fly agaric; and A. phalloides is the death cup.

erence between the magnetic and the true or astronomical amplitude (see 3 above) is the "variation of the compass."