American Heritage® Dictionary of the English Language, Fourth Edition
- n. An insect gall on oak trees, caused by certain wasp larvae.
Century Dictionary and Cyclopedia
- n. An oak-gall. See gal.
- n. In Australia, a cone of any one of several species of Casuarina, or she-oak, especially C. stricta. The young cones and foliage have an acid taste when chewed, and afford great relief in cases of thirst. See she-oak and Casuarina.
- n. Oak gall.
GNU Webster's 1913
- n. a large, smooth, round gall produced on the leaves of the American red oak by a gallfly (Cynips confluens). It is green and pulpy when young.
- n. oak gall caused by larvae of a cynipid wasp
“Then one January day the great oak apple reappeared on a saltmarsh and seemed almost settled for a moment until the Equinox tide of 19 March 2003 floated it free.”
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