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

See also

• OTH (disambiguation) (with a letter O)
• Zeroth law (disambiguation)
• Zeroth-order (disambiguation)