What's the difference between grain and quartzite?

Grain

Definition:

(v. & n.) See Groan.
(n.) A single small hard seed; a kernel, especially of those plants, like wheat, whose seeds are used for food.
(n.) The fruit of certain grasses which furnish the chief food of man, as corn, wheat, rye, oats, etc., or the plants themselves; -- used collectively.
(n.) Any small, hard particle, as of sand, sugar, salt, etc.; hence, any minute portion or particle; as, a grain of gunpowder, of pollen, of starch, of sense, of wit, etc.
(n.) The unit of the English system of weights; -- so called because considered equal to the average of grains taken from the middle of the ears of wheat. 7,000 grains constitute the pound avoirdupois, and 5,760 grains the pound troy. A grain is equal to .0648 gram. See Gram.
(n.) A reddish dye made from the coccus insect, or kermes; hence, a red color of any tint or hue, as crimson, scarlet, etc.; sometimes used by the poets as equivalent to Tyrian purple.
(n.) The composite particles of any substance; that arrangement of the particles of any body which determines its comparative roughness or hardness; texture; as, marble, sugar, sandstone, etc., of fine grain.
(n.) The direction, arrangement, or appearance of the fibers in wood, or of the strata in stone, slate, etc.
(n.) The fiber which forms the substance of wood or of any fibrous material.
(n.) The hair side of a piece of leather, or the marking on that side.
(n.) The remains of grain, etc., after brewing or distillation; hence, any residuum. Also called draff.
(n.) A rounded prominence on the back of a sepal, as in the common dock. See Grained, a., 4.
(a.) Temper; natural disposition; inclination.
(a.) A sort of spice, the grain of paradise.
(v. t.) To paint in imitation of the grain of wood, marble, etc.
(v. t.) To form (powder, sugar, etc.) into grains.
(v. t.) To take the hair off (skins); to soften and raise the grain of (leather, etc.).
(n.) To yield fruit.
(n.) To form grains, or to assume a granular ferm, as the result of crystallization; to granulate.
(n.) A branch of a tree; a stalk or stem of a plant.
(n.) A tine, prong, or fork.
(n.) One the branches of a valley or of a river.
(n.) An iron first speak or harpoon, having four or more barbed points.
(n.) A blade of a sword, knife, etc.
(n.) A thin piece of metal, used in a mold to steady a core.

Example Sentences:

(1) First, it has diverted grain away from food for fuel, with over a third of US corn now used to produce ethanol and about half of vegetable oils in the EU going towards the production of biodiesel.
(2) It is possible that the formation of a mycetoma grain may limit a patient's exposure to antigens which confer specificity, an explanation which may also account for the variability in antibody responses seen.
(3) Preserving alfalfa as silage and feeding in a TMR to cows in early lactation resulted in greater milk production via increased DMI or improved feed efficiency compared with preserving alfalfa as hay and feeding grain separately.
(4) Results indicate that the rachitogenic factor in rye is not present in the ash portion of the grain, that it can be largely overcome by water extraction and penicillin supplementation, and that an organic solvent extraction has no effect.
(5) Light microscope autoradiography revealed the development of specific silver grains in the medial layer of epineurial and perineurial arteries in sections of sciatic nerve exposed either to [3H]DHA or [3H]QNB.
(6) The 180-acre imperial palace appears to send ripples through the surrounding urban grain like a rock thrown into a pond, forming the successive layers of ring-roads.
(7) The impact of pollen on the respiratory mucosa was modeled by studying the process by which solutes are eluted from pollen grains.
(8) One part fresh pollen grains is uniformly mixed with nine parts of the solution and left at room temperature for at least 5 hr.
(9) With [3H]proline as precursor, the grain densities were greater over surface epithelium than over submucosal gland.
(10) We have recently demonstrated in vitro a potential biological mechanism which could occur in vivo upon inhaling airborne graon dust, thereby constituting a potential inflammatory insult to the respiratory tracts of grain workers.
(11) In addition, livestock-rearing can use up to 200 times more water a kilogram of meat compared to a kilo of grain.
(12) Dietary recommendations for cancer prevention advise reduced intake of fat; increased intake of fruits, vegetables, and grains; and moderate intake of alcohol and salt-cured, salt-pickled, and smoked foods.
(13) Most cases are diagnosed histologically by identification of an actinomycotic grain in the center of the abscess or by cytologic features on Papanicolaou smears.
(14) The labelling intensity (as estimated by the number of silver grains per unit of cytoplasmic area) was maximum in cells having dense-cored vesicles whose mean diameter was between 130 and 170 nm, but decreased for cells with mean diameter of dense cores smaller than 130 nm, or larger than 170 nm.
(15) Comparison of autoradiograms with Nissl-stained sections allowed precise correlation of autoradiographic grain distribution with cytoarchitecture.
(16) "Nonthyroidectomy" cells had few silver grains over RER; most were over secretory granules and Golgi areas.
(17) After 2,6 and 24 hours there is a progressive increase of silver grains on the extracellular space most of them concentrated over thick collagen fibrils.
(18) The grain distribution over luteal cells and arteriolar smooth muscle was reduced (p less than 0.001) after coincubation with excess unlabeled LTC4 but not with excess unlabeled LTA4, LTB4, LTD4, LTE4, prostaglandin (PG)E2, PGF2 alpha or PGI2.
(19) The pollen sterility (up to 30% of grains) is due to the abortive spore development.
(20) The resolution of radioautography with 59Fe was determined with a line source and the distance from the hot line within which half of the grains fell (HD value) was 1650 A.