Acting as a complement; making up a whole with something else.
Of the specific pairings of the bases in DNA and RNA.
Pertaining to pairs of properties in quantum mechanics that are inversely related to each other, such as speed and position, or energy and time. (See also Heisenberg uncertainty principle.)
A complementary colour.
An angle which adds with another to equal 90 degrees.
That serves as an addition
The situation where a student who holds a qualification equivalent to part of a degree course is then accepted onto a degree course at an intermediate point, without having to start it from the beginning.
Additional credit purchased for a mobile phone.
An addition.
An additional premium paid over the initial premium in order to increase benefit values.
A serving of drink used to top up an existing glass.
A dose of epidural anesthetic added to previously injected spinal anesthetic in combined spinal-epidural anesthesia