saxifrage: [15] The saxifrage is etymologically the ‘stone-breaker’. The word comes via Old French saxifrage from late Latin saxifraga, a compound formed from Latin saxum ‘rock’ and frag-, the stem of frangere ‘break’ (source of English fraction, fracture, etc). The name is an allusion to the fact that the plant grows in crevices in rock, and so gives the impression of splitting the rock. => fraction, fracture, fragment[saxifrage etymology, saxifrage origin, 英语词源]