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Dictionary


to•rus



Pronunciation: (tôr'us, tōr'-), [key]
n.,
pl. to•riPronunciation: (tôr'ī, tōr'ī). [key]

1. Archit. a large convex molding, more or less semicircular in profile, commonly forming the lowest molding of the base of a column, directly above the plinth, sometimes occurring as one of a pair separated by a scotia and fillets. See illus. at molding and column.
2. Geom.
a. a doughnut-shaped surface generated by the revolution of a conic, esp. a circle, about an exterior line lying in its plane.
b. the solid enclosed by such a surface.
3. Bot.
a. the receptacle of a flower.
b. a thickening of the wall membrane in the bordered pits occurring in the tracheid cells of the wood of many conifers.
4. Anat.a rounded ridge; a protuberant part.

Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.

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