(chemistry) Abbreviation of methylenedioxypyrovalerone. / (veterinary medicine) Abbreviation of Muscovy duck parvovirus.

(astronomy) A method of stellar classification in which stars are assigned Greek letters (α, β, γ, etc.) in decreasing order of brightness.

That can be spoken; utterable, verbalizable. / Acceptable as a topic of discussion; not subject to taboo. / (obsolete) Capable of speech.

(military) A factor, such as better positioning or equipment, which increases a unit's combat potential, allowing it to fight on a par with a larger force.