Page:Dictionary of aviation.djvu/197

 DICTIONARY OF AVIATION 173

point point n. precise limit or degree.

point-to-point 'pemt-to^oint adj. extending from one

point or city to another : as, a *peinMo?pemt tip. poise peiz w.

1. equality of weight; a balanced or hovering condition; equilibrium, balance, equipoise.

2. one of the peisers of a dipterous insect; a balancer; a halter.

poise peiz v.

1. tr. hold or maintain in equilibrium ; keep balanced.

2. intr. be balanced or held in equilibrium; be kept bal- anced; remain stedy.

poise-point 'peiz,p0int n. the peint at irhich the tohip^line of a kite is attacht to the bridle, and at tuhich the kite is thus peised.

poiser 'pei-zsz n. one of a pair of slender processes with clubd ends placed near the insertion of the wings in a dipterous insect or a male coccid, supposed to aid in peis- ing, balancing, or equilibrating the insect; a halter, a bal- ancer.

poising 'pei-zirj n. balancing, hovering.

polar 'poo-tez adj.

polar band, a band or stip of cloud extending over the sky from a point on the horizon to the epposit point; a Noah's Ark.

polar cap of cold air, the cap or mass of cold air which covers the nerth or south polar region of the earth, flow- ing toward the equator into the westerly planetary cur- rents.

pole pool n.

1. either one of two points en the surface of the earth or other sferical bedy or the like which are equidistant from the equator, or are otherwise establisht as centers, termini, or points having certain prominent characteristics of posi- tion, influence, or function: as, the nerth *pole; the mag- netic *pole ; the galactic *pole.

magnetic pole, one of the two pernts on the earth's sur- face where the magnetic dipping-needle stands vertical ; the pole of verticity.

pole of cold, the pole or peint in the polar regions of the earth tuhere, at any given season, the wether is coldest ; the cold pole.

pole of snow, the pole or peint in the polar regions of the earth having the most, or the longest-lasting snow.

2. either of the extremities (upper or lower) of the ver- tical axis of the sfere or gasbag of a sfereidal balloon.

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