half-open interval

[ haf-oh-puh n, hahf- ]
/ ˈhæfˌoʊ pən, ˈhɑf- /

noun Mathematics.

a set of numbers between two given numbers but including only one endpoint.
Also called half-closed interval [haf-klohzd, hahf-] /ˈhæfˌkloʊzd, ˈhɑf-/

Words nearby half-open interval