استدار

[It had, or assumed, a round, or circular, form; it coiled itself, or became coiled; it wound, or wound round;] it was, or became, round. (KL.) You say, استدار القَمَرُ [The moon became round, or full: see also the act. particle n., below]. (A.) And لَفَّتْ ثَوْبًا كَالْعِصَابَةِ عَلَى اسْتِدَارَةِ رَأْسِهَا [She wound a piece of cloth like the fillet upon the round of her head, leaving the crown uncovered]. (Mgh and L and Msb voce مِعْجَرٌ.)

See also 1, in six places.

And see 4.