| MSDS | material safety data sheet |
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| MSDS | Material Safety DAta Sheet |
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shelf force
| derma | <anatomy, dermatology> Mesodermally derived connective tissue underlying the epithelium of the skin. (18 Nov 1997) |
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| karaya gum | <chemical> Polysaccharide gum from sterculia urens, an indian tree; it is used as suspending or stabilizing agent in foods, cosmetics and pharmaceuticals; also as bulk-forming laxative, surgical lubricant and adhesive and in the treatment of skin ulcers. Pharmacological action: cathartic, excipient, tissue adhesives. Chemical name: Karaya gum (12 Dec 1998) |
| guard | 1. One who, or that which, guards from injury, danger, exposure, or attack; defense; protection. "His greatness was no guard to bar heaven's shaft." (Shak) 2. A man, or body of men, stationed to protect or control a person or position; a watch; a sentinel. "The guard which kept the door of the king's house." Kings xiv. 27. 3. One who has charge of a mail coach or a railway train; a conductor. 4. Any fixture or attachment designed to protect or secure against injury, soiling, or defacement, theft or loss; as: That part of a sword hilt which protects the hand. Ornamental lace or hem protecting the edge of a garment. A chain or cord for fastening a watch to one's person or dress. A fence or rail to prevent falling from the deck of a vessel. An extension of the deck of a vessel beyond the hull; especially, in side-wheel steam vessels, the framework of strong timbers, which curves out on each side beyond the paddle wheel, and protects it and the shaft against collision. A plate of metal, beneath the stock, or the lock frame, of a gun or pistol, having a loop, called a bow, to protect the trigger. An interleaved strip at the back, as in a scrap book, to guard against its breaking when filled. 5. A posture of defense in fencing, and in bayonet and saber exercise. 6. An expression or admission intended to secure against objections or censure. "They have expressed themselves with as few guards and restrictions as I." (Atterbury) 7. Watch; heed; care; attention; as, to keep guard. 8. <zoology> The fibrous sheath which covers the phragmacone of the Belemnites. Guard is often used adjectively or in combination; as, guard boat or guardboat; guardroom or guard room; guard duty. Advanced guard, Coast guard, etc. See Advanced, Coast, etc. Grand guard, one of the posts of the second line belonging to a system of advance posts of an army. Guard boat. A boat appointed to row the rounds among ships of war in a harbor, to see that their officers keep a good lookout. A boat used by harbor authorities to enforce the observance of quarantine regulations. <botany> Guard cells, to go on duty as a guard or sentinel. To run the guard, to pass the watch or sentinel without leave. Synonym: Defense, shield, protection, safeguard, convoy, escort, care, attention, watch, heed. Origin: OF. Guarde, F. Garde; of German origin; cf. OHG. Wart, marto, one who watches, mata a watching, Goth. Wardja watchman. See Guard. Source: Websters Dictionary (01 Mar 1998) |
| guard cell | <plant biology> Plant cells occurring in pairs in the epidermis, flanking each stoma. Changes in turgor in the guard cells cause the stoma to open and close. (18 Nov 1997) |
| beta pleated sheet | <cell biology> Beta secondary structure in proteins consists of two almost fully extended polypeptide chains lying side by side, linked by interchain hydrogen bonds between peptide C=O and N H groups. The chains may run in the same or opposite directions (yielding parallel or antiparallel structures, respectively). When multiple chains are involved, an extended sheet, the pleated sheet, is formed. (18 Nov 1997) |
| sheet | 1. To furnish with a sheet or sheets; to wrap in, or cover with, a sheet, or as with a sheet. "The sheeted dead." "When snow the pasture sheets." 2. To expand, as a sheet. "The star shot flew from the welkin blue, As it fell from the sheeted sky." (J. R. Drake) To sheet home, to haul upon a sheet until the sail is as flat, and the clew as near the wind, as possible. Origin: Sheeted; Sheeting. In general, a large, broad piece of anything thin, as paper, cloth, etc.; a broad, thin portion of any substance; an expanded superficies. Specifically: A broad piece of cloth, usually linen or cotton, used for wrapping the body or for a covering; especially, one used as an article of bedding next to the body. "He fell into a trance, and saw heaven opened, and a certain vessel descending unto him, as it had been a great sheet knit at the four corners." (Acts x. 10, 11) "If I do die before thee, prithee, shroud me In one of those same sheets." (Shak) A broad piece of paper, whether folded or unfolded, whether blank or written or printed upon; hence, a letter; a newspaper, etc. A single signature of a book or a pamphlet; in pl, the book itself. "To this the following sheets are intended for a full and distinct answer." (Waterland) A broad, thinly expanded portion of metal or other substance; as, a sheet of copper, of glass, or the like; a plate; a leaf. A broad expanse of water, or the like. "The two beautiful sheets of water." . A sail. <geology> An extensive bed of an eruptive rock intruded between, or overlying, other strata. 2. [AS. Sceata. See the Etymology above. A rope or chain which regulates the angle of adjustment of a sail in relation in relation to the wind; usually attached to the lower corner of a sail, or to a yard or a boom. Pl. The space in the forward or the after part of a boat where there are no rowers; as, fore sheets; stern sheets. Sheet is often used adjectively, or in combination, to denote that the substance to the name of which it is prefixed is in the form of sheets, or thin plates or leaves; as, sheet brass, or sheet-brass; sheet glass, or sheet-glass; sheet gold, or sheet-gold; sheet iron, or sheet-iron, etc. A sheet in the wind, half drunk. Both sheets in the wind, very drunk. In sheets, lying flat or expanded; not folded, or folded but not bound; said especially of printed sheets. Sheet bend, a bend or hitch used for temporarily fastening a rope to the bight of another rope or to an eye. Sheet lightning, Sheet piling, etc. See Lightning, Piling, etc. Origin: OE. Shete, schete, AS. Scte, scte, fr. Sceat a projecting corner, a fold in a garment (akin to D. Schoot sheet, bosom, lap, G. Schoss bosom, lap, flap of a coat, Icel. Skaut, Goth. Skauts the hem of a garment); originally, that which shoots out, from the root of AS. Sceotan to shoot. See Shoot. Source: Websters Dictionary (01 Mar 1998) |
| draw-sheet | A narrow sheet placed crosswise on the bed under the patient, with a rubber sheet of the same width beneath it; used to assist in moving the patient or in changing soiled bed coverings. (05 Mar 2000) |
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