ASTATIC a.
aving little or no tendency to take a fixed or definite position or direction: thus, a suspended magnetic needle, when rendered astatic, loses its polarity, or tendency to point in a given direction. Astatic pair (Magnetism), a pair of magnetic needles so mounted as to be nearly or quite astatic, as in some galvanomete…
ATMOSPHERIC; ATMOSPHERICAL a.
Dependent on the atmosphere. [R.] In am so atmospherical a creature. Pope. Atmospheric engine, a steam engine whose piston descends by the pressure of the atmosphere, when the steam which raised it is condensed within the cylinder. Tomlinson. -- Atmospheric line (Steam Engin.), the equilibrium line of an indicator car…
ATTENDANT a. 2 definitions
Depending on, or owing duty or service to; as, the widow attendant to the heir. Cowell. Attendant keys (Mus.), the keys or scales most nearly related to, or having most in common with, the principal key; those, namely, of its fifth above, or dominant, its fifth below (fourth above), or subdominant, and its relative min…
AURICULATE; AURICULATED a.
Having ears or appendages like ears; eared. Esp.: (a) (Bot.) Having lobes or appendages like the ear; shaped like the ear; auricled. (b) (Zoöl.) Having an angular projection on one or both sides, as in certain bivalve shells, the foot of some gastropods, etc. Auriculate leaf, one having small appended leaves or lobes o…