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Fountain Powerboats Industries, Inc. , four four-colour problem a mathematical problem to prove that any plane map can be coloured with only four colours so that no two same-coloured regio… tetra- , tetra-, before a vowel tetr-, repr. Gr. tetra-, comb. form of téttares, téttara four, as in tetrachord XVII. tetragon four-angle figure. XVII. — Gr.;… Plus Fours , Plus Fours
First introduced during the 1920s, plus fours were a variation on the traditional knee pants called knickers, which had been worn by men,… Four-letter Word , FOUR-LETTER WORD. A word of four letters considered vulgar or obscene and referring to sex or excrement, such as (with varying degrees of offensive f… Four Horsemen Of The Apocalypse , Skip to main content Tetrapods (animals) , Tetrapoda An informal grouping that includes the vertebrate animals which have four limbs; i.e. the Amphibia, Reptilia, Aves, and Mammalia.
Tetrapoda…
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Four Rustics, The