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Important notice

Good news! We have updated our writing tools. Writing Tips and The Canadian Style have been combined to create a new tool called Writing Tips Plus.

Don’t forget to update your bookmarks. Within a few weeks, Writing Tips will no longer be available.

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


The combining form di- has two meanings.

Meaning 1: twice, double

  • Orchids are dichromatic flowers: they have two colours.

Meaning 2: made up of two atoms

  • Carbon dioxide is released into the atmosphere.