Page:Dictionary of aviation.djvu/144

 120 DICTIONARY OF AVIATION

soft hail, hail made up of small hailstones or frozen rain* drops, usually mixt with rain and melting rapidly. hail heel v.

1. intr. (impersonally}: it hails, hail falls;, (with subject) pour or send down hail.

2. tr. pour down as hail; throw or send down a shower like hail in a sterm.

hail-band 'hee^baend n. a band or narrow tgact of ground coverd with hail; one of the strips of land (usually parallel to each other and to the path of the sterm) which, as a result of a hailstorm, is left coverd over with hailstones.

hail-cloud 'hee^kzxiod n. a cloud from which hail falls; a cumulus cloud in the hail stage.

hail-gage 'hee^geeds n. [also spelt hailigauge'] a gage for mesuring the amount of hail which has fallen; a rainsgage so arranged as to separate the hail from the rain and allow of the separate mesurement of each.

hail-shower 'heel,$au-9z n. a shower or light fall of hail.

hailstone 'heel,stoon n. one of the stones or pebble^like masses of ice which fall in a hailstorm ; a pellet of hail.

hailstorm 'heel,st0:zm n. [also spelt haiUstorm} a storm or violent fall of hail.

hair-hygrometer 'he:z-hai,gzemi-t9z n. an instrument in- vented by Saussure for mesunng atmosferic humidity; a
 * hair^hygroscope.

half -gale 'ha:f,geel n. a gale intermediate between a mod- erate gale and a whole gale; a fresh or strong gale.

halo 'hee-lo n. [plural halos. haloes'} a circle of either white or prismatically colord light seen round a luminous body and usually due to refraction; specifically, one of the pair of large colord or white concentric circles, red inside, com- monly of 22 or 46 degrees radius, sometimes seen around the sun or moon, and due to the refraction of light as it passes thru ices=crystals of cirrus cloud or cirro^nebula.

diffraction halo, a halo due to diffraction of light, rather than to refraction or dispersion.

halter 'haeltaz n. [ploral halteres] one of a pair of slender processes with clubd ends placed near the insertion of the wings in a dipterous insect or a male ceccid, supposed to aid in balancing the insect; a peiser; a balancer.

halter es ,hsel'ti:,ziz n. pi. see halter.

hamuli 'haemjo^ai n. pi. see hamulus.

hamulus 'hsemjo-tes n. [ploral hamuli'} one of the minute hooks or hoofcslike processes similar to the (plain) barbicels or cilia, forming a fringe or frayed edge to a barbule of a bird's f ether; a booklet.

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