(biology) Any of various biological sciences that deal with living things in a space environment

Alternative letter-case form of space age

The region of space containing objects that an optical system can form images of.

Alternative spelling of n space

The environment encountered by living creatures (and vehicles) in space; especially a lack of atmosphere and gravity

(in an electromagnetic coil) The ratio of the volume occupied by the wire in the winding, or the iron in the core, to the total volume of the winding or the core

The loss of energy of a signal (due to absorption, dispersion etc) as it travels through a medium; measured in decibels

(physics) The localized excess electric charge in a specific volume; especially such a negative charge

Alternative spelling of space defense

(informal) Space debris.