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Leaf
(lf), n.; pl. Leaves (lvz). [OE. leef, lef, leaf, AS. lef; akin to S. lf, OFries. laf, D. loof foliage, G. laub, OHG. loub leaf, foliage, Icel. lauf, Sw. lf, Dan. lv, Goth. laufs; cf. Lith. lapas. Cf. Lodge.]
1. (Bot.) A colored, usually green, expansion growing from the side of a stem or rootstock, in which the sap for the use of the plant is elaborated under the influence of light; one of the parts of a plant which collectively constitute its foliage.
Such leaves usually consist of a blade, or lamina , supported upon a leafstalk or petiole, which, continued through the blade as the midrib, gives off woody ribs and veins that support the cellular texture. The petiole has usually some sort of an appendage on each side of its base, which is called the stipule. The green parenchyma of the leaf is covered with a thin epiderm pierced with closable microscopic openings, known as stomata.
2. (Bot.) A special organ of vegetation in the form of a lateral outgrowth from the stem, whet
Leaf
(lf), v. i.[imp. & p. p.Leafed (lft); p. pr. & vb. n.Leafing.] To shoot out leaves; to produce leaves; to leave; as, the trees leaf in May. Sir T. Browne.
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