H-hour
noun
The time of day at which an attack, landing, or other military operation is scheduled to begin: they assured the Marines that at H-hour the reef would be covered by five feet of water...
- Preplanned raids at specific H-hours typified the 4th ID's operations.
- H-hour of 2359 would produce maximum surprise, making it difficult for enemy forces to mobilize to repel an invasion.
- A compromise was reached and the H-hour was changed from 1800 hours to 1405 hours on 6 October.
Origin
First World War: from H (for hour) + hour.
- discutant
- discute
- discutient
- disc valve
- disc wheel
- disc worship
- disdain
- disdainful
- disdainfully
- disdainfulness
- disease
- diseased
- disease-free
- disease management
- disease-resistant
- disease-ridden
- diseconomy
- disembark
- disembarkation
- disembarrass
- disembarrassment
- disembodied
- disembodiment
- disembody
- disembogue