0th
# 0th

0th or zeroth may refer to:

## Mathematics, science and technology

* 0th or zeroth, an ordinal for the number 0
* 0th dimension, a topological space
* 0th element, of a data structure in computer science
* 0th law of Thermodynamics
* Zeroth (software), deep learning software for mobile devices

## Other uses

* 0th grade, another name for kindergarten
* January 0 or January 0th, an alternate name for December 31
* 0 Avenue, a road in British Columbia straddling the Canada-US border
