Having a paddle wheel on each side; said of steam vessels.

(nautical) Having sides nearly perpendicular, rather than flaring or tumbling home.

To roller skate with feet pointing in opposite directions.

Alternative form of sidelock

plural of side-lock

plural of positive side waterproofing

(astronomy) One day of sidereal time; the time in which Earth rotates once around its axis, relative to the point of the vernal equinox (about 23 hours, 56 minutes, 4 seconds).

(astrology) A form of astrology that measures the position of the sun relative to the stars. This compensates for the precession of Earth's axis, which causes the zodiac signs to move around the sky relative to the vernal equinox.

having flat sides / (US, colloquial) tall, or long and lank

(astronomy) The sidereal day of a planet. (I.e., in the definition for "sidereal day", replace "Earth" by the given planet.)