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Important notice

Writing Tips has been archived and won’t be updated before it is permanently deleted.

For the most up-to-date content, please consult Writing Tips Plus, which combines content from Writing Tips and The Canadian Style. And don’t forget to update your bookmarks!

To begin your search, go to the alphabetical index below and click on the first letter of the word you are searching for.

hyphens: numerals and single letters

Hyphenate numerals or single letters and the words they modify:

  • e-cigarette
  • e-commerce
  • e-learning
  • S-hook
  • T-shirt
  • U-turn
  • 1,2-dimethylbutylene
  • 2,4-D

Note: In the word email, the tendency today is to drop the hyphen. However, the hyphenated spelling e-mail is still in use among more conservative writers and is also acceptable.

Do not hyphenate a compound adjective when the second element is a letter or figure:

  • Class II railroad (not Class-II railroad)
  • Grade A milk (not Grade-A milk)