I, 9th letter of the alphabet. This vowel can be pronounced with a short vowel sound, as the ĭ in sit, or with a long vowel sound, like the Ī in ride. The Greek correspondent is iota. J is a formal development from I. English is pronounced as a diphthong of ä and y. In chemistry I is the symbol of the element iodine.
The Columbia Electronic Encyclopedia, 6th ed. Copyright © 2012, Columbia University Press. All rights reserved.