Carpal tunnel syndrome is numbness, tingling, weakness, and other problems in your hand because of pressure on the median nerve in your wrist. The median nerve and several tendons run from your forearm to your hand through a small space in your wrist called the carpal tunnel. The median nerve controls movement and feeling in your thumb and first three fingers (not your little finger). Pressure on the median nerve causes carpal tunnel syndrome.
Astronomy. 1  Also called period of rotation. the time in which a body rotates once on its axis. 2  Also called period of revolution. the time in which a planet or satellite revolves once about its primary.
epoch - (astronomy) an arbitrarily fixed date that is the point in time relative to which information (as coordinates of a celestial body) is recorded date of reference astronomy, uranology - the branch of physics that studies celestial bodies and the universe as a whole