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trochoidal
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trochoidal
trochoidal, a. (trəʊˈkɔɪdəl) [f. prec. + -al1.] 1. Geom. Having the form or nature of a trochoid; pertaining or relating to trochoids: see prec. A. 1.1799 Young in Phil. Trans. XC. 137 A similar chord bent into a trochoidal curve. 1861 W. Froude Rolling of Ships (1862) 23 The wave would be more accu...
Oxford English Dictionary
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Trochoidal wave
In fluid dynamics, a trochoidal wave or Gerstner wave is an exact solution of the Euler equations for periodic surface gravity waves. The flow field associated with the trochoidal wave is not irrotational: it has vorticity.
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trochotron
trochotron Electronics. (ˈtrɒkəʊtrən) [f. trochoidal a. + -tron.] A type of magnetron in which there are a number of anodes at different angular positions around the central cathode, with the electron beam able to be switched from one anode to another.1947 Alfvén & Romanus in Nature 1 Nov. 614/1 Res...
Oxford English Dictionary
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Prolate trochoidal mass spectrometer
mutually perpendicular electric and magnetic fields so that the ions follow a prolate trochoidal path. The trochoidal configuration can also be used as the basis of an electron monochromator.
References
External links
Mass spectrometry
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Ceratitida
In a few later forms the shell became subglobular, in others, trochoidal or uncoiled.
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hypotrochoid
hypotrochoid Geom. (h(a)ɪpəʊˈtrəʊkɔɪd, h(a)ɪˈpɒtrəʊkɔɪd) [f. hypo- 2 + trochoid.] The curve described by a point rigidly connected with the centre of a circle which rolls on the inside of another circle.1843 Penny Cycl. XXV. 282/1 A class [of curves] called..hypotrochoids, of which one particular ca...
Oxford English Dictionary
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Dignamoconcha
Species
Dignamoconcha dulcissima Iredale, 1944 – the pagoda pinhead snail
Description
The trochoidal shell of the mature snail is 3.3 mm in height, with
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Melloconcha grata
Description
The trochoidal shell of the mature snail is 4.5 mm in height, with a diameter of 6.6 mm, and an elevated spire.
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Aethoceras
Trochoidal coiling brings to mind the later Trocholitidae. Aethoceras was originally found in the lower Ordovician of Western Australia.
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Hedleyoconcha addita
Description
The trochoidal shell of adult snails is 5.6 mm in height, with a diameter of 7 mm, with a high conical spire, flat sutures and whorls rounded
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Munditia meridionalis
The delicate, white-gray shell has a depressed trochoidal shape and is deeply umbilicate. it contains 4 whorls.
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Innesoconcha aberrans
Description
The depressedly trochoidal shell of the mature snail is 4.4–5.1 mm in height, with a diameter of 6.9–8.1 mm, golden-brown in colour.
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Pernastela howensis
Description
The trochoidal shell of the mature snail is 1.8–2.1 mm in height, with a diameter of 3–3.3 mm, and a raised spire.
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NSU Delphin III
In the supercharger, both a trochoidal inner rotor and epitrochoidal outer rotor spun around a stationary shaft.
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Innesoconcha catletti
Description
The depressedly trochoidal shell of the mature snail is 4.3–6.8 mm in height, with a diameter of 8.6–11.8 mm, yellow-brown in colour.
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