Definition of turnsole in English:

turnsole

noun

  • A Mediterranean plant of the spurge family, whose flowers are said to turn with the sun.

    • ‘The following is a construction guide for anyone who wishes to make a pair of authentic turnsoles.’

Origin

Late Middle English: from Old French tournesole, based on Latin tornare (see turn) + sol sun.

Pronunciation:

turnsole

/ˈtəːnsəʊl/