one-thirty
UK[ˌwʌn ˈθɜːti]US[ˌwʌn ˈθɜːrti]
n
The time thirty minutes after one o'clock, either a.m. or p.m.
n
The number 130.
Etymology
The term 'one-thirty' is a modern English compound, directly combining the cardinal number 'one' with the cardinal number 'thirty'. Its formation follows the standard Germanic pattern for creating complex numerals, where the tens and units are named in sequence. The logic is purely arithmetic, representing either the sum of one hundred and thirty or a specific point on the clock derived from the base hour 'one' plus thirty minutes. This transparent compounding reflects the analytical nature of English number construction, building complex meanings from simple, inherited Germanic roots without morphological fusion.
Analysis
This is a compound numeral formed from two English number words. 'One' originates from Old English 'ān', of Germanic origin, related to Dutch 'een' and German 'ein', from an Indo-European root shared by Latin 'unus'. 'Thirty' originates from Old English 'þrītig' (from 'þrīe' 'three' and '-tig' group of ten), of Germanic origin.
Examples
The meeting is scheduled for one-thirty this afternoon.
The highway patrol reported a crash at mile marker one-thirty.
Please set the oven temperature to one-thirty degrees Celsius.