The phrase "a half turn around" is correct and usable in written English.
It can be used to describe a movement or rotation of 180 degrees, often in contexts involving physical actions or directions.
Example: "To face the opposite direction, simply take a half turn around."
Alternatives: "a 180-degree turn" or "a half rotation".
One is a spiral ramp that corkscrews one and a half turns around the sphere, starting at the equator line.
The general curvature of the seed spirals of A. mirabilis (Fig. 9D) is intermediate, accounting for its intermediate extent of a half-turn around the cone (180°; Fig. 9E, F).
He showed a measure of his old self last night against Tim Duncan and Robinson in the first half, turning around and fading away, making pillowy jump shots and keeping the Knicks close.
"Everything that went awry in the first half turned around.
At t = 20 s, the bead switches back to right-handed rotation and takes another half turn around the MT. Finally, at t = 25 s, the bead resumes left-handed helical motion until it disassociates from the MT. Arrows show the transitions from one type of helical motion to the other.
Midway through the second half, Magath had been feeling far more upbeat, as had the Craven Cottage crowd, who were singing in giddy endorsement of their team's second-half turn-around.
The nucleosome consists of ∼147 bp of DNA wrapped in about one and half turns around an octameric protein core containing two H2A-H2B dimers and one (H3-H4) tetramer.
(Actually, for me it had really started with a dawn call to watch our passage through the Straits of Messina followed by a brisk two-mile walk - five and half turns around the Bridge Deck equals one mile - to work off last night's dinner to make room for this morning's breakfast).
Richard Baker, the former Asda executive brought in at Boots over a year and a half ago to turn around the ailing retailer, will be chief executive of the merged group, and will conduct the day-to-day running of the business.
The cochlea is a spiral tube that is coiled two and one-half turns around a hollow central pillar, the modiolus.
