首座星

Ascendant \As*cend"ant\, n. [F. ascendant, L. ascendens; p. pr.
of ascendere.]
1. Ascent; height; elevation. [R.]

Sciences that were then in their highest ascendant.
--Temple.

2. (Astrol.) The horoscope, or that degree of the ecliptic
which rises above the horizon at the moment of one's
birth; supposed to have a commanding influence on a
person's life and fortune.

Note: Hence the phrases

{To be in the ascendant}, to have commanding power or
influence, and

{Lord of the ascendant}, one who has possession of such power
or influence; as, to rule, for a while, lord of the
ascendant. --Burke.

3. Superiority, or commanding influence; ascendency; as, one
man has the ascendant over another.

Chievres had acquired over the mind of the young
monarch the ascendant not only of a tutor, but of a
parent. --Robertson.

4. An ancestor, or one who precedes in genealogy or degrees
of kindred; a relative in the ascending line; a
progenitor; -- opposed to {descendant}. --Ayliffe.