Cassinian

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• Cassinian ovals — Cas*sin i*an o vals (Math.) See under {Oval}. [1913 Webster] …   The Collaborative International Dictionary of English

• Cassinian oval — Oval O val, n. A body or figure in the shape of an egg, or popularly, of an ellipse. [1913 Webster] {Cassinian oval} (Geom.), the locus of a point the product of whose distances from two fixed points is constant; so called from Cassini, who first …   The Collaborative International Dictionary of English

• Canadian Epoch — The Canadian is the Lower or Early Ordovician in North America. The term is common in the older literature and has been well understood for more than a century. However is has no official recognition by the ICS* and has been superseded by the… …   Wikipedia

• Oval — O val, n. A body or figure in the shape of an egg, or popularly, of an ellipse. [1913 Webster] {Cassinian oval} (Geom.), the locus of a point the product of whose distances from two fixed points is constant; so called from Cassini, who first… …   The Collaborative International Dictionary of English

• Cassini oval — Some Cassini ovals. (b=0.6a, 0.8a, a, 1.2a, 1.4a, 1.6a) A Cassini oval is a plane curve defined as the set (or locus) of points in the plane such that the product of the distances to two fixed points …   Wikipedia

• Musean hypernumber — Musean hypernumbers are an algebraic concept envisioned by Charles A. Musès (1919–2000) to form a complete, integrated, connected, and natural number system.[1][2][3][4][5] Musès sketched certain fundamental types of hypernumbers and a …   Wikipedia

• Michelinoceras — Temporal range: Early Ordovician Devonian, possibly to Late Triassic Scientific classification Kingdom: Animalia Phylum: Mollusca …   Wikipedia

• Ordovician — Period 488.3–443.7 million years ago …   Wikipedia

• Polynomial lemniscate — In mathematics, a polynomial lemniscate or polynomial level curve is a plane algebraic curve of degree 2n, constructed from a polynomial p with complex coefficients of degree n.For any such polynomial p and positive real number c, we may define a …   Wikipedia

• Piloceratidae — Taxobox name = Piloceratidae fossil range = Ordovician regnum = Animalia phylum = Mollusca classis = Cephalopoda subclassis = Nautiloidea ordo = Endocerida familia = Piloceratidae subdivision ranks = genus subdivision = * dagger; Allopiloceras *… …   Wikipedia