plural of memorandum

Refers to the orbit of a satellite whose rate of revolution is matched to the rotation period of the Earth. A special case is the geostationary orbit which is circular and equatorial, so that the s...

(logic, model theory) The ⊨ symbol used to denote semantic consequence, or the ⊨ symbol used to denote the fact that the model to the left of it satisfies the set of sentences to its right.

(informal) Sexual perversion.