Half-hourly a. : Done or happening at intervals of half an hour.

Example:
If I block a user on MySpace, will I stop receiving their ridiculous Half-hourly bulletins?

Taxonomy
WordNet, word meaning, adjective, half hour, business term, Unanswered questions, hourly employee, Pertains, adverb, Search, Princeton University, Company, Press Room, Privacy Policy, IP Issues, AnswerTips, Widget, Reference library.

Defination from the web:
half-hourly has one meaning: Meaning #1 : occurring every ... Do employers of convenience stores have to pay time and half for overtime for an hourly employee? ...