adjective Botany.
of or pertaining to plants having broad or relatively broad leaves, rather than needles.
Also, broadleaf, broadleafed, broad-leafed [brawd-leeft] .

1545–55 Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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World English Dictionary
denoting trees other than conifers, most of which have broad rather than needle-shaped leaves

Collins English Dictionary - Complete & Unabridged 10th Edition
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American Heritage
Science Dictionary
broad-leaved (brôd'lēvd') also broad-leafed  [%PREMIUM_LINK%]     (brôd'lēvd')  Pronunciation Key 
Having broad leaves rather than needlelike or scalelike leaves. Broad leaves are adapted to maximizing photosynthesis by capturing large amounts of sunlight. Since the gases that are exchanged with the atmosphere in photosynthesis must be dissolved in water, most broad-leaved plants grow in regions with dependable rainfall. See more at leaf, transpiration.

The American Heritage® Science Dictionary
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