half-turn

[ haf-turn, hahf- ]
/ ˈhæfˌtɜrn, ˈhɑf- /

noun

a 180-degree turn; a direct reversal of direction or orientation, as from front to back or left to right.
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

Examples from the Web for half-turn