(mineralogy) A tetragonal-pyramidal mineral containing calcium, hydrogen, iron, oxygen, and phosphorus.

(transitive) To make a gift of (something). / (transitive) To relinquish control over. / (transitive) To formally hand over a bride to the bridegroom; often by her father.

Occurring every twenty-five years. / Of or related to a twenty-five-year period.

plural of time stream