American Heritage Dictionary
(1)
Century Dictionary
(2)
GNU Webster's 1913
(1)
WordNet
(2)
Elsewhere on the web
By the Chinese it is thought very efficacious, although on what theory it is difficult to understand Entering the city from the north gate, after crossing the ditch that separates the walls from, the French Concession, we find ourselves in close and extremely narrow streets, with shops opening upon them, neither glass nor any partition separating them from passers by.— The Continental Monthly, Vol. 6, No. 6, December 1864 Devoted To Literature And National Policy
The sling probably never proved very efficacious, as its accuracy for birds on the wing is too uncertain.— Short Sketches from Oldest America

American Heritage Dictionary (1)
Century Dictionary (1)
Bubble size: how much this word was used in a year
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