adjective

1. of a day: extra day or days inserted into a calendar
2. of a month: extra month inserted into a calendar. The w:Hebrew calendar, Hebrew calendar has such a month.
3. (botany) of a meristem: situated between zones of permanent tissue, thus a shoot growing at the base of a leaf, in comparison with apical growth at the tip of a root or plant.

noun the International Date Linecategory:English nouns (context, singulare tantum)

1. An imaginary line on the Earth's surface at 180° longitude, mostly through the Pacific Ocean, to the east of which the calendar date is one day earlier than to the west.

adjective

1. having the same duration
2. happening at regular periods; isochronous, periodic

1. (computing) (of data) time dependent

adjective

1. happening at regular intervals
   
2. happening at the same time; isochronal
   
3. (computing) of or pertaining to the use of clocks derived from the same clock reference
   

   Their entire national telephone network is , with a clock distribution tree radiating from a single, protected cesium reference clock.
   

4. (computing) of or pertaining to data associated with time sensitive application
   

   These packets belong to an voice application and need priority handling.