raft

   A thin sheet of crystalline calcite supported by surface tension on a cave pool or lake. The calcite is precipitated mainly in response to evaporation of the pool water and rafts are therefore found mainly in caves in arid regions or caves with powerful through draughts.

A Lexicon of Cave and Karst Terminology with Special Reference to Environmental Karst Hydrology. . 2002.

Look at other dictionaries:

  • raft — [ raft ] n. m. • 1985; mot angl. ♦ Embarcation gonflable insubmersible manœuvrée à la pagaie et utilisée pour la descente des rapides (⇒ rafting). ● raft nom masculin (mot anglais) Radeau pneumatique pour la pratique du rafting. raft n. m.… …   Encyclopédie Universelle

  • raft — raft1 [raft, räft] n. [ME rafte, beam, rafter < ON raptr, log: see RAFTER1] 1. a flat, buoyant structure of logs, boards, barrels, etc. fastened together; specif., one used like a boat as in an emergency or in shallow water 2. a similar… …   English World dictionary

  • Raft — Raft, n. [Originally, a rafter, spar, and fr. Icel. raptr a rafter; akin to Dan. raft, Prov. G. raff a rafter, spar; cf. OHG. r[=a]fo, r[=a]vo, a beam, rafter, Icel. r[=a]f roof. Cf. {Rafter}, n.] 1. A collection of logs, boards, pieces of timber …   The Collaborative International Dictionary of English

  • raft — [rɑːft ǁ ræft] noun a raft of something a large number of things: • There has been a raft of new laws aimed at giving better protection to children in the past few years. * * * raft UK US /rɑːft/ US  /ræft/ noun [C] ● a raft of sth Cf. a raft of… …   Financial and business terms

  • Raft — Raft, v. t. [imp. & p. p. {Rafted}; p. pr. & vb. n. {Rafting}.] To transport on a raft, or in the form of a raft; to make into a raft; as, to raft timber. [1913 Webster] …   The Collaborative International Dictionary of English

  • Raft — 〈n. 15〉 schwimmende Insel [engl., „Floß“] * * * Raft, das; s, s [engl. raft, eigtl. = Floß, zu: rafter = (Dach)sparren, aus dem Anord.]: 1. schwimmende Insel aus [Treib]holz. 2. Schlauchboot, mit dem Rafting betrieben wird. * * * Raft, das; s, s… …   Universal-Lexikon

  • raft — Ⅰ. raft [1] ► NOUN 1) a flat buoyant structure of timber or other materials fastened together, used as a boat or floating platform. 2) a small inflatable boat. 3) a floating mass of fallen trees, ice, etc. ► VERB ▪ travel or transport on or as if …   English terms dictionary

  • Raft — bezeichnet: ein Rafting, mit dem ein Fluss, gewöhnlich schwereres Wildwasser, befahren wird. in der Zellbiologie Lipid Rafts, Cholesterin reiche Lipid „Inseln“ in Plasmamembran Leaflets. Raft ist der Familienname folgender Personen: George Raft… …   Deutsch Wikipedia

  • raft — [ra:ft US ræft] n [Sense: 1, 3 4; Date: 1200 1300; : Old Norse; Origin: raptr large piece of wood, rafter ] [Sense: 2; Date: 1800 1900; Origin: raff mixture of things (17 19 centuries), influenced by RAFT1] 1.) a flat floating structure, usually… …   Dictionary of contemporary English

  • raft — [ ræft ] noun count 1. ) a simple flat boat made by tying long pieces of wood together a ) a small light boat made of rubber or plastic 2. ) a flat structure that floats on a lake, river, etc. that people can swim to and lie on a raft of INFORMAL …   Usage of the words and phrases in modern English

  • Raft — (r[.a]ft), obs. imp. & p. p. of {Reave}. Spenser. [1913 Webster] …   The Collaborative International Dictionary of English

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