A slide valve with a cup-like cavity in its face, through which exhaust steam passes.

(music) A minor key with the notes D, E, F, G, A, B♭, C. / (music) The minor chord with a root of D.

plural of D-pillar

(US, law) Initialism of doing business as.

plural of D-notice

(music) A subgenre of hardcore punk.

Initialism of one-dimensional.

A selective service class denoting that the registrant is already a reserve member of the armed forces or a student taking military training, as in ROTC or an accepted aviation cadet applicant.

(medicine) Once per day, used for prescription directions.

Alternative form of DOF (In the sense Degree(s) of Freedom)