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rophorus. Pyrophoric iron (Chem.), finely reduced iron, which ignites spontaneously on contact with air.

rning furnaces, etc., in which the incoming air or gas is heated by being brought into contact with masses of iron, brick, etc., which have been previously heated by the outgoing, or escaping, hot air or gas.

A syntactical relation between words, as when one depends on another and is regulated by it in respect to case or mood; government.

ther without slipping; to bring all the parts of (one line or surface) into successive contact with another, in suck manner that at every instant the parts that have been in contact are equal.

lling upon another which arises from the roughness or other quality of the surfaces in contact. -- Rolling mill, a mill furnished with heavy rolls, between which heated metal is passed, to form it into sheets, rails, etc. -- Rolling press. (a) A machine for calendering cloth by pressure between revolving rollers. (b)…

appear upon a polished surface, as glass, when objects which have been near to, or in contact with, the surface are removed and the surface breathed upon; -- called also Moser's images.

A salt of saccholactactic acid; -- formerly called also saccholate. [Obs.] See Mucate.

To burn with hot liquid or steam; to pain or injure by contact with, or imersion in, any hot fluid; as, to scald the hand. Mine own tears Do scald like molten lead. Shak. Here the blue flames of scalding brimstone fall. Cowley.

Any large holothurian, especially one of those belonging to the genus Pentacta, or Cucumaria, as the common American and European species. (P. frondosa).

substantive is emphasized: "Native practical intelligence, natural prudence, mother wit, tact in behavior, acuteness in the observation of character, in contrast to habits of acquired learning or of speculation." -- Moral sense. See under Moral, (a). -- The inner, or internal, sense, capacity of the mind to be aware…

edge, to affect the teeth with a disagreeable sensation, as when acids are brought in contact with them. -- To set the watch (Naut.), to place the starboard or port watch on duty. -- To set to, to attach to; to affix to. "He . . . hath set to his seal that God is true." John iii. 33. -- To set up. (a) To erect; to…

of a body to slide relatively to each other in a direction parallel to their plane of contact; -- also called shearing stress, and tangential stress.

lue of the time; also, to a passage the tones of which are to be somewhat prolonged or protacted.

oduced by the impulse or vibration of the air or other medium with which the ear is in contact; the effect of an impression made on the organs of hearing by an impulse or vibration of the air caused by a collision of bodies, or by other means; noise; report; as, the sound of a drum; the sound of the human voice; a horr…

nd of a spar usually projecting from the bow of a vessel, and intended to explode upon contact with an enemy's ships.

drops or masses, at a temperature several degrees below ebullition, and without actual contact with the heated surface, -- a phenomenon due to the repulsive force of heat, the intervention of a cushion of nonconducting vapor, and the cooling effect of evaporation.

roduced by the extrusion of a viscid, transparent liquid, which hardens on coming into contact with the air; -- said of the spider, the silkworm, etc.

ernal, siphunculated shell in the form of a flat spiral, the coils of which are not in contact.

n which one drives in different directions one's own and the opponent's ball placed in contact.

ature higher than the boiling point corresponding to its pressure. It can not exist in contact with water, nor contain water, and resembles a perfect gas; - - called also surcharged steam, anhydrous steam, and steam gas. -- Wet steam, steam which contains water held in suspension mechanically; -- called also misty ste…