conical spiral
1Conical scanning — is a system used in early radar units to improve their accuracy, as well as making it easier to steer the antenna properly to point at a target. Conical scanning is similar in concept to the earlier lobe switching concept used on some of the… …
2spiral — [spī′rəl] adj. [ML spiralis < L spira, a coil < Gr speira: see SPIRE1] 1. circling around a central point in a flat, two dimensional curve that constantly increases (or decreases) in size 2. circling around a central axis in a conical or… …
3Wentletrap — Taxobox name = Wentletrap image caption = Two shells of Epitonium humphreysii , Humphrey s wentletrap regnum = Animalia phylum = Mollusca classis = Gastropoda subclassis = Orthogastropoda superordo = Caenogastropoda ordo = Sorbeoconcha subordo =… …
4wentletrap — /wen tl trap /, n. any of several marine gastropods of the family Epitonii (Scalariidae), having a whitish, spiraled shell. [1750 60; < D wenteltrap, earlier wendeltrap spiral staircase, equiv. to wend(en) to turn + freq. el (Compare wentelen to… …
5Vertigines — Vertigo Ver ti*go (?; 277), n.; pl. E. {Vertigoes}, L. {Vertigines}. [L., fr. vertere to turn. See {Verse}.] 1. (Med.) Dizziness or swimming of the head; an affection of the head in which objects, though stationary, appear to move in various… …
6Vertigo — Ver ti*go (?; 277), n.; pl. E. {Vertigoes}, L. {Vertigines}. [L., fr. vertere to turn. See {Verse}.] 1. (Med.) Dizziness or swimming of the head; an affection of the head in which objects, though stationary, appear to move in various directions,… …
7Vertigoes — Vertigo Ver ti*go (?; 277), n.; pl. E. {Vertigoes}, L. {Vertigines}. [L., fr. vertere to turn. See {Verse}.] 1. (Med.) Dizziness or swimming of the head; an affection of the head in which objects, though stationary, appear to move in various… …
8scan type — The path made in space by a point on the radar beam; for example, circular, helical, conical, spiral, or sector …
9The Second Coming (poem) — The Second Coming is a poem by William Butler Yeats first printed in The Dial (November 1920) and afterwards included in his 1921 verse collection Michael Robartes and the Dancer . The poem uses religious symbolism to illustrate Yeats anguish… …
10endothelins — (= ET 1, ET 2, ET 3) Group of peptide hormones (all 21 residues) released by endothelial cells. All have two disulphide bridges that hold them in a conical spiral shape. They are the most potent vasoconstrictor hormones known. Structurally… …
