ETYM Old Eng. leef, lef, leaf, as. leáf; akin to s. lôf, OFries. laf, Dutch loof foliage, German laub, Old High Germ. loub leaf, foliage, Icel. lauf, Swed. löf, Dan. löv, Goth. laufs; cf. Lith. lapas. Related to Lodge.
Lateral outgrowth on the stem of a plant, and in most species the primary organ of photosynthesis. The chief leaf types are cotyledons (seed leaves), scale leaves (on underground stems), foliage leaves, and bracts (in the axil of which a flower is produced).
Typically leaves are composed of three parts: the sheath or leaf base, the petiole or stalk, and the lamina or blade. The lamina has a network of veins through which water and nutrients are conducted. Structurally the leaf is made up of mesophyll cells surrounded by the epidermis and usually, in addition, a waxy layer, termed the cuticle, which prevents excessive evaporation of water from the leaf tissues by transpiration. The epidermis is interrupted by small pores, or stomata, through which gas exchange between the plant and the atmosphere occurs.
A simple leaf is undivided, as in the maple or oak. A compound leaf is composed of several leaflets, as in the blackberry, horse chestnut, or ash (the latter being a pinnate leaf). Leaves that fall in the autumn are termed deciduous, while evergreen leaves are persistent.
(Irregular plural: leaves).
1. A sheet of any written or printed material; SYN. folio.
2. Hinged or detachable flat section (as of a table or door).
3. The main organ of photosynthesis and transpiration in higher plants; SYN. leafage, foliage. + prikaži više

ETYM Old Eng. shete, schete, as. scęte, scyte, from sceát a projecting corner, a fold in a garment (akin to Dutch schoot sheet, bosom, lap, German schoss bosom, lap, flap of a coat, Icel. skaut, Goth. skauts the hem of a garment).
1. A flat man-made object that is thin relative to its length and width; SYN. flat solid.
2. A large rectangular piece of cotton or linen cloth; used in pairs for bed linens; SYN. bed sheet.
3. A line (rope or chain) that regulates the angle at which a sail is set in relation to the wind; SYN. tack, mainsheet, weather sheet, shroud.
4. Any broad thin expanse or surface.
5. A piece of paper used for writing or printing; SYN. paper, sheet of paper, leaf, folio, page. + prikaži više