Căs'tile-sōap, n.
n. [From Castile, or Castilia, a province in Spain, from which it originally comes. See infra.] A kind of fine, hard, white, or mottled soap, made with olive oil and soda.
n. [From Castile, or Castilia, a province in Spain, from which it originally comes. See infra.] A kind of fine, hard, white, or mottled soap, made with olive oil and soda.