GNU Collaborative International Dictionary of English

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1.       
   Bract , n. [See Bractea.] (Bot.) (a) A leaf, usually smaller than the true leaves of a plant, from the axil of which a flower stalk arises. (b) Any modified leaf, or scale, on a flower stalk or at the base of a flower.
   1913 Webster
   ☞ Bracts are often inconspicuous, but sometimes large and showy, or highly colored, as in many cactaceous plants. The spathes of aroid plants are conspicuous forms of bracts.
   1913 Webster