Chem. [f. L. concha shell + -ol- diminutive + -IN.] The organic constituent of the shells of mollusks, closely allied to Keratin.
1870. Rolleston, Anim. Life, Introd. 89. A rigid support of conchiolin.
1888. Rolleston & Jackson, Anim. Life, 126. The nacre consists of alternating lamellæ of conchiolin, and of conchiolin containing calcareous deposits.
