well-tempered
adjective (well tempered when postpositive)
(of a musical scale or instrument) conforming to the system of equal temperamentSee temperament (def. 4)
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
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Examples from the Web for well-tempered
Historical Examples of well-tempered
On the contrary, the Well-tempered Clavichord grows younger with time.
Old FogyJames Huneker
The Sajous are well-tempered creatures, and easily domesticated.
Well, they make bayonets there now, just as sharp and just as well-tempered.
George BrownJohn Lewis
I could, with well-tempered steel, cut asunder a seven-times-folded piece of silk at one blow without fraying out a thread.
VendettaMarie Corelli
It was forged of some bluish metal that seemed as strong and flexible as well-tempered steel.
The Golden Amazons of VenusJohn Murray Reynolds