Is it spelled Dietitian or Dietician?

Dietitian Vs Dietician

Below is the official entry in the Marriam-Webster Dictionary for 2013:

Main Entry: di·e·ti·tian Variant(s): or di·e·ti·cian
Function: noun
Etymology: dietitian irregular from 1diet + -ician
Date: circa 1846
Definition: a specialist in dietetics

Nutritionist-World.com, as the leading educational and career advancement portal for nutritionists and dietitians throughout North America, is home to a wide and international audience of individuals. For this reason, we tend to spell terms as they pertain to specific regions.

The term Dietitian, also spelled Dietician, is a term that is spelled either way depending on the region in which you may be spelling it. Many times Canadians will spell the term Dietician, with a "C", where as the spelling Dietitian, with a "T", is most common.

However, Nutritionist-World.com does specify that the correct term within the dietetic industry is spelled Dietitian, with a "T".