D defs.my
Entry 1 sense Webster, 1913

Pipe clay

/(klā`)/ · Pipe· clay · IPA
01 A plastic, unctuous clay of a grayish white color, -- used in making tobacco pipes and various kinds of earthenware, in scouring cloth, and…
  1. 1.
    A plastic, unctuous clay of a grayish white color, -- used in making tobacco pipes and various kinds of earthenware, in scouring cloth, and in cleansing soldiers' equipments.