three-quarter-turn

three-quarter-turn

Descriptive of a stair which, in its progress from top to bottom, turns 270°.
References in periodicals archive ?
Then the link is made between the 360[degrees] of a whole turn, and the measure in degrees of other fractions of a turn: a quarter-turn, a half-turn, a three-quarter-turn, a sixth-turn, and so on (Figure 10).