wentletrap

[wen-tl-trap]
noun
any of several marine gastropods of the family Epitonii (Scalariidae), having a whitish, spiraled shell.

Origin:
1750–60; < Dutch wenteltrap, earlier wendeltrap spiral staircase, equivalent to wend(en) to turn + frequentative -el- (compare wentelen to revolve) + trap trap1)

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World English Dictionary
wentletrap (ˈwɛntəlˌtræp)
 
n
any marine gastropod mollusc of the family Epitoniidae, having a long pointed pale-coloured longitudinally ridged shell
 
[C18: from Dutch winteltrap spiral shell, from wintel, earlier windel, from wenden to wind + trap a step, stairs]

Collins English Dictionary - Complete & Unabridged 10th Edition
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Encyclopedia Britannica
Encyclopedia

wentletrap

any marine snail of the family Epitoniidae (subclass Prosobranchia of the class Gastropoda), in which the turreted shell-consisting of whorls that form a high, conical spiral-has deeply ribbed sculpturing. Most species are white, less than 5 cm (2 inches) long, and exude a pink or purplish dye. Wentletraps occur in all seas, usually near sea anemones, from which they suck nourishment. The common wentletrap (Epitonium clathrus) occurs in European waters; the money wentletrap (E. indianorum) is common from Alaska to Mexico

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Encyclopedia Britannica, 2008. Encyclopedia Britannica Online.
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Example sentences
The results revealed that bubble rafters descended from a bottom-dwelling snail called the wentletrap, which still exists today.
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