SIDEREAL a. 2 definitions
Measuring by the apparent motion of the stars; designated, marked out, or accompanied, by a return to the same position in respect to the stars; as, the sidereal revolution of a planet; a sidereal day. Sidereal clock, day, month, year. See under Clock, Day, etc. -- Sideral time, time as reckoned by sideral days, or, t…
SIGNATURE n. 9 definitions
A sign, stamp, or mark impressed, as by a seal. The brain, being well furnished with various traces, signatures, and images. I. Watts. The natural and indelible signature of God, which human souls . . . are supposed to be stamped with. Bentley.