adjective
ith
yth
adjective
1
Used after a number to form an ordinal, standing in for a variable position in a sequence (as in "the ith term").
"In the formula, a_i refers to the ith element of the list."
How to Use Ith
Learner’s notesIn plain EnglishA mathematical/programming shorthand meaning "the number in position i," used when the exact position is a variable rather than fixed.
When to use it
Almost exclusively used in maths, computer science, and technical writing.
Word Forms
iths plural
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In the formula, a_i refers to the _____ element of the list.
Etymology
Formed from the letter i (used as a placeholder variable) plus the ordinal suffix -th, as in "fourth" or "fifth."