[eych-ouuh r, -ou-er] /ˈeɪtʃˌaʊər, -ˌaʊ ər/
the time, usually unspecified, set for the beginning of a planned attack.
(military) the specific hour at which any operation commences Also called zero hour
1. . [Department of] Health and Human Services
Hereditary Hemorrhagic Telangiectasia Foundation International
happy holidays to you and yours
1. higher heating value 2. human herpes virus