D-shape spar

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• Spar (mineralogy) — Spar is a term that is used to refer to a category of crystals that have readily discernible faces. Crystallized, earthy, and some metallic, a spar will easily break into rhomboidal, cubical, or laminated fragments with polished surfaces, but… …   Wikipedia

• sparable — [ sparəb(ə)l] noun a headless nail used for the soles and heels of shoes. Origin C17: contr. of sparrow bill, with ref. to the nail s shape …   English new terms dictionary

• Glossary of nautical terms — This is a glossary of nautical terms; some remain current, many date from the 17th 19th century. See also Wiktionary s nautical terms, Category:Nautical terms, and Nautical metaphors in English. Contents: A B C D E F G H I J K L M N O P Q R …   Wikipedia

• Supermarine Spitfire — Infobox Aircraft name =Spitfire type =Fighter manufacturer =Supermarine caption =The distinctive silhouette of a typical Spitfire shows elliptical wings. (P7350, a Mk IIa, was first delivered to 266 Squadron on 6 September 1940.) designer =R. J.… …   Wikipedia

• Crab claw sail — Micronesian proa with crab claw sail The crab claw sail or, as it is sometimes known, Oceanic lateen or Oceanic sprit, is a triangular sail with spars along upper and lower edges. The crab claw sail is used in many traditional Pacific Ocean… …   Wikipedia

• Selenite — This article is about the mineral: for other meanings, see Selenite (disambiguation). Selenite, satin spar, desert rose, and gypsum flower are four varieties of gypsum; all four varieties show obvious crystalline structure. The four crystalline… …   Wikipedia

• Proa — A proa or prau is a type of multihull sailing vessel. While the word proa just means boat in its native language, the term proa in Western languages has come to describe a vessel consisting of two (usually) unequal length parallel hulls, sailed… …   Wikipedia

• John Carver Meadows Frost — known as Jack (born 1915 in Walton on Thames, England, died 9 October 1979 in Auckland, New Zealand) was a British aircraft designer. His primary contributions centred on pioneering supersonic British experimental aircraft and as the chief… …   Wikipedia

• Vespa — Infobox Company company name = Vespa company company type = Subsidiary slogan = Not just a scooter, a way of life founder = foundation = 23 April, 1946 in Florence location city = flagicon|Italy Pontedera location country = Italy key people = num …   Wikipedia

• Stephen Mallory — For his son, also a Senator, see Stephen Mallory II. Stephen Russell Mallory 1st Confederate States Secretary of the Navy In office March 4, 1861 – May 20, 1865 …   Wikipedia

• sedimentary rock — Rock formed at or near the Earth s surface by the accumulation and lithification of fragments of preexisting rocks or by precipitation from solution at normal surface temperatures. Sedimentary rocks can be formed only where sediments are… …   Universalium