packless

Of valve: without a packed gland for stem sealing, having a metal diaphragm instead.

Adjective

  1. Of valve: without a packed gland for stem sealing, having a metal diaphragm instead.

    Synonyms: packingless

  2. Not wearing or carrying a pack.
    • Bets has left her hat and sweater in Tal and wants to go back for it. I agree to go with her. Bets and I take off for Tal racing down the trail, packless and wearing sneaks. - 1982 February 13, Lee Swislow, “Amazon...

Origin

From pack + -less.