balloon envelope

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• balloon flight — ▪ aviation Introduction  passage through the air of a balloon that contains a buoyant gas, such as helium or heated air, for which reason it is also known as lighter than air free flight. Unmanned balloons have been used to carry meteorological… …   Universalium

• envelope — ► NOUN 1) a flat paper container with a sealable flap, used to enclose a letter or document. 2) a covering or containing structure or layer. 3) the outer housing of a vacuum tube, electric light, etc. 4) the structure within a balloon or non… …   English terms dictionary

• envelope — [än′və lōp΄, en′′və lōp΄] n. [Fr & OFr enveloppe < OFr envoluper: see ENVELOP] 1. a thing that envelops; wrapper; covering 2. a folded paper container as for a letter, usually with a gummed flap for sealing 3. a) the outer covering of a rigid… …   English World dictionary

• Balloon (aircraft) — Ballooning redirects here. For the behavior of spiders and other arthropods, see Ballooning (spider). Not to be confused with Airship or Blimp. Balloon …   Wikipedia

• Envelope (disambiguation) — An envelope is the paper container used to hold a letter being sent by post.Envelope may also refer to:In science: * Envelope (mathematics), a curve, surface, or higher dimensional object defined as being tangent to a given family of lines or… …   Wikipedia

• balloon — I (New American Roget s College Thesaurus) n. aerostat, blimp; free, sounding, kite, pilot, or dirigible balloon; fire balloon, montgolfier. See aviation. v. i. swell. See convexity. II (Roget s IV) n. Syn. dirigible, aircraft, airship, weather… …   English dictionary for students

• envelope — noun Date: circa 1714 1. a flat usually paper container (as for a letter) 2. something that envelops ; wrapper < the envelope of air around the earth > 3. a. the outer covering of an aerostat b. the bag containing the gas in a balloon or airship… …   New Collegiate Dictionary

• balloon classification — Balloons are classified in two ways: according to their shape and to their volume. There are four types of balloon shapes: bulbous, those with a smooth gore, diagonal cut gores, and straight cut gores. i. Bulbous gore balloons consist of 8 to 12… …   Aviation dictionary

• envelope — /ˈɛnvəloʊp / (say envuhlohp), /ˈɒn / (say on ) noun 1. a cover for a letter or the like, usually so made that it can be sealed or fastened. 2. that which envelops; a wrapper, integument, or surrounding cover. 3. Botany a surrounding or enclosing… …  

• envelope — n. 1 a folded paper container, usu. with a sealable flap, for a letter etc. 2 a wrapper or covering. 3 the structure within a balloon or airship containing the gas. 4 the outer metal or glass housing of a vacuum tube, electric light, etc. 5… …   Useful english dictionary

• Hot air balloon — This article is about hot air balloons themselves. For the associated activity, see hot air ballooning. For the rock opera, see Hot Air Balloon (rock opera). For the song, see Hot Air Balloon (song). Hot air balloon in flight …   Wikipedia