permanent administrative committee of the U.S.S.R., 1924, from Russian prezidium, from Latin praesidium "a presiding over, defense," from praesidere "to protect," literally "to sit before" (see preside).
late 14c., "periodical sitting of a court," from Old French session "act or state of sitting; assembly," from Latin sessionem (nominative sessio) "act of sitting; a seat; loitering; a session," noun of action from past participle stem of sedere "to sit" (from PIE root *sed- (1) "to sit"). Sense of "period set aside for some activity" is first recorded 1920, in bull session, probably from quarter sessions courts (see quarter (n.1)). Musical sense of "recording occasion in a studio" is from 1927.
"to roost, to alight or settle on or as on a perch; to occupy some elevated position," late 14c., from Old French perchier "to sit on a perch" (of a bird), from perche (n.); see perch (n.1). Related: Perched; perching.