APSIS n.
of the two points of an orbit, as of a planet or satellite, which are at the greatest and least distance from the central body, corresponding to the aphelion and perihelion of a planet, or to the apogee and perigee of the moon. The more distant is called the higher apsis; the other, the lower apsis; and the line joinin…
ARTLESS a.
; honest; as, an artless mind; an artless tale. They were plain, artless men, without the least appearance of enthusiasm or credulity about them. Porteus. O, how unlike the complex works of man, Heaven's easy, artless, unencumbered plan! Cowper.
AZOIC a.
Destitute of any vestige of organic life, or at least of animal life; anterior to the existence of animal life; formed when there was no animal life on the globe; as, the azoic. rocks. Azoic age (Geol.), the age preceding the existence of animal life, or anterior to the paleozoic tome. Azoic is also used as a noun, age…
AZOLE n.
ompounds characterized by a five- membered ring which contains an atom of nitrogen and at least one other noncarbon atom (nitrogen, oxygen, sulphur). The prefixes furo-, thio, and pyrro-are used to distinguish three subclasses of azoles, which may be regarded as derived respectively from furfuran, thiophene, and pyrrol…
BLIND a.
he side which is most easily assailed; a weak or unguarded side; the side on which one is least able or disposed to see danger. Swift. -- Blind snake (Zoöl.), a small, harmless, burrowing snake, of the family Typhlopidæ, with rudimentary eyes. -- Blind spot (Anat.), the point in the retina of the eye where the optic…