American Heritage Dictionary
Century Dictionary
(4)
GNU Webster's 1913
(1)
WordNet
Elsewhere on the web
The authority provides all public transit services within Cuyahoga County, including rail rapid transit, light rail, fixed route, community circulator, and paratransit.— Digital50.com Digital 50 Daily Industry News RSS Feed
The bag is placed in a thermal immersion circulator (our next gadget) and cooks at a constant temperature for an extended period of time, creating a flavorful and well-cooked end product.— Discovery Channel :: Top Highlights
The thermal immersion circulator is the next part of the equation in "sous-vide" cooking.— Discovery Channel :: Top Highlights
"The circulator is something that has become popular [among chefs]," Selker notes.— Discovery Channel :: Top Highlights

Century Dictionary (1)
If you'd like to prod us on getting a pronunciation for this word, sign in (or sign up) and let us know.
Bubble size: how much this word was used in a year
Bubble height: used more or less than expected, vs. all uses evenly distributed
You can expect to see this word about once a year.