twenty-four-hour clock

== English == === Etymology === From twenty-four +‎ hour +‎ clock. === Pronunciation === (Received Pronunciation) IPA(key): /ˌtwɛntiˈfɔːɹˌaʊə ˈklɒk/ (General American) IPA(key): /ˌtwɛntiˈfɔɹˌaʊəɹ ˈklɔk/, [-ɾi-], (cot–caught merger) /-ˈklɑk/ Rhymes: -ɒk === Noun === twenty-four-hour clock (plural twenty-four-hour clocks) Alternative form of 24-hour clock (“a timekeeping convention in which the 24 hours of the day are treated as a single period rather than two sets of 12 hours, with the result that midnight is indicated as 00:00 (or sometimes 24:00), and the hours from 1:00 to 11:00 p.m. as 13:00 to 23:00”).