Fire

Upper Air

hydrophobia

1. An abnormal fear of water.

2. Rabies.

hygrometer

Any of several instruments that measure atmospheric humidity.

isobar

1. A line on a weather map connecting points of equal atmospheric pressure. Also called isopiestic.

2. Any of two or more kinds of atoms having the same atomic mass but different atomic numbers.

1. Symbol P A highly reactive, poisonous, nonmetallic element occurring naturally in phosphates, especially apatite, and existing in three allotropic forms, white (or sometimes yellow), red, and black. An essential constituent of protoplasm, it is used in safety matches, pyrotechnics, incendiary shells, and fertilizers and to protect metal surfaces from corrosion. Atomic number 15; atomic weight 30.9738; melting point (white) 44.1°C; boiling point 280°C; specific gravity (white) 1.82; valence 3, 5. See Table at element.

2. A phosphorescent substance.

1. The design and construction of aircraft.

2. The theory and practice of aircraft navigation.

1. Characterized by lightness and insubstantiality; intangible.

2. Highly refined; delicate. See Synonyms at airy.

3.

a. Of the celestial spheres; heavenly.

b. Not of this world; spiritual.

4. Chemistry Of or relating to ether.

caustic

1. Capable of burning, corroding, dissolving, or eating away by chemical action.

2. Corrosive and bitingly trenchant; cutting. See Synonyms at sarcastic.

3. Causing a burning or stinging sensation, as from intense emotion: "Most of all, there is caustic shame for my own stupidity" (Scott Turow).

n.

1. A caustic material or substance.

2. A hydroxide of a light metal.

3. The enveloping surface formed by light rays reflecting or refracting from a curved surface, especially one with spherical aberration.

1. A separation or division into factions.

2.

a. A formal breach of union within a Christian church.

b. The offense of attempting to produce such a breach.

3. Disunion; discord.

exodus

1. A departure of a large number of people.

2. Exodus

a. The departure of the Israelites from Egypt.

b. Abbr. Ex or Exod. See Table at Bible.

pyrotechnical

1. Of or relating to fireworks.

2. pyrotechnic Resembling fireworks; brilliant: a pyrotechnic wit; pyrotechnic keyboard virtuosity.

1. Great destruction resulting in the extensive loss of life, especially by fire.

2.

a. Holocaust The genocide of European Jews and others by the Nazis during World War II: "Israel emerged from the Holocaust and is defined in relation to that catastrophe" (Emanuel Litvinoff).

b. A massive slaughter: "an important document in the so-far sketchy annals of the Cambodian holocaust" (Rod Nordland).

3. A sacrificial offering that is consumed entirely by flames.

-phoric, -phorous

bearing; producing