(n) a line of defense consisting of a barrier of felled or live trees with branches (sharpened or with barbed wire entwined) pointed toward the enemy, Syn.abatis
The Collaborative International Dictionary of English (GCIDE) v.0.53
{ } pos>n. [ F. abatis, abattis, mass of things beaten or cut down, fr. abattre. See Abate. ] (Fort.) A means of defense formed by felled trees, the ends of whose branches are sharpened and directed outwards, or against the enemy. [ 1913 Webster ]
a. [ Gr. 'adia`batos not passable; 'a priv. + dia` through + bai`nein to go. ] (Physics) Not giving out or receiving heat. -- Ad`i*a*bat`ic*al*ly, adv. [ Webster 1913 Suppl. ]
☞The adiabatic expansion of carbon dioxide from a compressed container causes the temperature of the gas to decrease rapidly below its freezing point, resulting in the familiar carbon dioxide “snow” emitted by carbon dioxide fire extinguishers. [ PJC. ]
Adiabatic line or curve, a curve exhibiting the variations of pressure and volume of a fluid when it expands without either receiving or giving out heat. Rankine. [ 1913 Webster ]
a. [ Iso- + Gr. &unr_; to pass through. ] (Physics) Pertaining to the reception or the giving out of equal quantities of heat by a substance. Rankine. [ 1913 Webster ]
Isodiabatic linesor Isodiabatic curves, a pair of lines or curves exhibiting, on a diagram of energy, the law of variation of the pressure and density of a fluid, the one during the lowering, and the other during the raising, of its temperature, when the quantity of heat given out by the fluid during any given stage of the one process is equal to the quantity received during the corresponding stage of the other. Such lines are said to be isodiabatic with respect to each other. Compare Adiabatic. [ 1913 Webster ]
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เช่น Secretary of State=รัฐมนตรีต่างประเทศของสหรัฐฯ (ในภาพตัวอย่าง),
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