Occult line (Geom.), a line drawn as a part of the construction of a
figure or problem, but not to appear in the finished plan. -- Occult
qualities, those qualities whose effects only were observed, but the
nature and relations of whose productive agencies were undetermined; --
so called by the schoolmen. -- Occult sciences, those sciences of the
Middle Ages which related to the supposed action or influence of occult
qualities, or supernatural powers, as alchemy, magic, necromancy, and
astrology.
Oc*cult", v. t. To eclipse; to hide from sight.
Oc`cul*ta"tion (?), n. [L. occultatio a hiding, fr. occultare, v.
intens. of occulere: cf.F. occultation. See Occult.] 1. (Astron.) The
hiding of a heavenly body from sight by the intervention of some other
of the heavenly bodies; -- applied especially to eclipses of stars and
planets by the moon, and to the eclipses of satellites of planets by
their primaries.