"half turn" is correct and usable in written English.
You might use it to describe a physical maneuver, such as, "He took a half turn and lunged at the ball."
He straightens it with a half turn.
So I half turn my back on him and take my thing out.
In the end, half turn their guns on themselves or are shot dead by others.
After about a mile and a half, turn left onto Station Avenue.
Fresh peas, with lashings of farm butter melting on top, a quick half turn of the pepper mill.
"If we're moving the ball really well, I like being in midfield, because you get the ball on the half turn," Dempsey said.
Michael Gardyne also tested the County keeper with a neat first-half turn and shot, Fraser leaping to his left to beat the ball to safety.
Another half-turn, and a nasty shooting war might have begun.
Adjust the Western political kaleidoscope a half-turn and Mr. Kim's decision not to return fire might even appear statesmanlike.
As a why-the-heck-not measure, I turned the connector a half-turn more, and tried the water again.
He receives the ball so well on the half-turn, was looking to create and make things happen.
