D defs.my
Entry 1 sense Webster, 1913

Halloysite

/(hăl*loi"sīt)/ · Hal·loy·site · IPA
01 n. A claylike mineral, occurring in soft, smooth, amorphous masses, of a whitish color.
  1. 1.
    A claylike mineral, occurring in soft, smooth, amorphous masses, of a whitish color.(Min.)