Envelope

конве́рт

konvért

(wrapper for mailing)

оболо́чка

obolóčka

(bag containing the lifting gas)

оболо́чка

obolóčka

(biology: enclosing structure or cover)

обёртка

objórtka

(something that envelops)

огиба́ющая

ogibájuščaja

(geometry: object that is the tangent to a family of objects)

огиба́ющая

ogibájuščaja

(electronics: curve that bounds a set of curves)

огиба́ющая

ogibájuščaja

(music: shape of a sound)