oblong number
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Pronic number — A pronic number, oblong number, rectangular number or heteromecic number, is a number which is the product of two consecutive integers, that is, n (n + 1). The n th pronic number is twice the n th triangular number and n more than… … Wikipedia
rectangular number — noun A number which is the product of two consecutive integers Syn: pronic, heteromecic, oblong number … Wiktionary
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pronic — adjective Of a number which is the product of two consecutive integers Pronic root is as if you say, 9 times 9 makes 81. And now take the root of 9, which is 3, and this 3 is added above 81: it makes 84, so that the pronic root of 84 is said to… … Wiktionary
heteromecic — adjective Of a number which is the product of two consecutive integers Syn: pronic See Also: rectangular number, oblong number … Wiktionary
fern — fernless, adj. fernlike, adj. /ferrn/, n. any seedless, nonflowering vascular plant of the class Filicinae, of tropical to temperate regions, characterized by true roots produced from a rhizome, triangular fronds that uncoil upward and have a… … Universalium
Fern — /ferrn/, n. a female given name. * * * Any of about 10,000–12,000 species (division Filicophyta) of nonflowering vascular plants that have true roots, stems, and complex leaves and reproduce by spores. Though ferns were once classified with the… … Universalium
