celestine

noun

1. a white to pale-blue mineral, strontium sulfate, SrSO4, occurring in tabular crystals, the principal ore of strontium.

noun

1. Saint,died a.d. 432, Italian ecclesiastic: pope 422–432.

noun

1. Guido di Castello, flourished 12th century, Italian ecclesiastic: pope 1143–44.

noun

1. Giacinto Bobone, died 1198, Italian ecclesiastic: pope 1191–98.

noun

1. Godfrey Castiglione, died 1241, Italian ecclesiastic: pope 1241.

noun

1. SaintPietro di Murrone or Morone, 1215–96, Italian ascetic: pope 1294.

noun

1. a white, red, or blue mineral consisting of strontium sulphate in orthorhombic crystalline form: a source of strontium compounds. Formula: SrSO 4