Trefoil

is a refractory structure in the preheating zone of some rotary kilns, dividing the kiln into three channels, to improve heat transfer between the hot gases and the limestone.
Found on http://www.encyclo.co.uk/visitor-contributions.php

Trefoil

Trefoil (from Latin trifolium, `three-leaved plant`, French trèfle, Italian trifoglio, German Dreiblatt and Dreiblattbogen, Dutch klaver same as clubs) is a graphic form composed of the outline of three overlapping rings used in architecture and Christian symbolism. The term is also applied to other symbols of three-fold shape. ==Architecture==.....
Found on http://en.wikipedia.org/wiki/Trefoil

Trefoil

• (n.) An ornamental foliation consisting of three divisions, or foils. • (n.) Any plant of the genus Trifolium, which includes the white clover, red clover, etc.; -- less properly, applied also to the nonesuch, or black medic. See Clover, and Medic. • (n.) A charge representing the clover leaf.
Found on http://thinkexist.com/dictionary/meaning/trefoil/

trefoil

1. <botany> Any plant of the genus Trifolium, which includes the white clover, red clover, etc.; less properly, applied also to the nonesuch, or black medic. See Clover, and Medic. ... 2. An ornamental foliation consisting of three divisions, or foils. ... 3. A charge representing the clover leaf. ... Origin: L. Tres three + E. Foil leaf; cf....
Found on http://www.encyclo.co.uk/local/20973

trefoil

noun an architectural ornament in the form of three arcs arranged in a circle
Found on https://www.encyclo.co.uk/local/20974

Trefoil

A cusped decoration of three lobes.
Found on http://www.digital-documents.co.uk/archi/gloschur.htm

Trefoil

A three lobed shape.
Found on http://www.encyclo.co.uk/local/20941

Trefoil

A three lobed shape.
Found on http://www.encyclo.co.uk/local/22200

Trefoil

A three-leafed shape.
Found on http://freespace.virgin.net/a.data/glossaryframes.htm

Trefoil

A three-lobed decorative form used in Gothic architecture
Found on http://www.encyclo.co.uk/local/22195

Trefoil

An ornament, or symbol, or architectural form which has three lobes or foils. Also called trilobed. If it is the plan of a building then the term triconch can also be used. Also see: triconch.
Found on http://www.virtualani.org/glossary/index.htm

trefoil

An ornamental form which has three lobes or foils.
Found on http://www.pitt.edu/~medart/menuglossary/INDEX.HTM

trefoil

Any of several clover plants of a group belonging to the pea family, the leaves of which are divided into three leaflets. The name is also used for other plants with leaves divided into three lobes. (Genus Trifolium, family Leguminosae.) Bird's-foot trefoil Lotus corniculatus, also belonging to the pea ...
Found on http://www.talktalk.co.uk/reference/encyclopaedia/hutchinson/m0007744.html

Trefoil

Clover-leaved pattern
Found on http://www.encyclo.co.uk/local/22203

Trefoil

In architecture a trefoil is an ornamental foliation consisting of three divisions, or foils used in Gothic architecture in the heads of window-lights, tracery, panellings, etc, in which the spaces between the cusps represent the form of a three-lobed leaf.
Found on http://www.probertencyclopaedia.com/browse/TT.HTM

Trefoil

In heraldry the term trefoil describes a charge representing the clover leaf.
Found on http://www.probertencyclopaedia.com/browse/UT.HTM

trefoil

literally '3 leaves': a three lobed shape formed by cusps (q.v.)
Found on http://www.encyclo.co.uk/local/20559

Trefoil

three-lobed
Found on https://www.encyclo.co.uk/local/20402

Trefoil

three-lobed
Found on http://www.encyclo.co.uk/local/22129

trefoil

three-lobed architectural ornament
Found on http://phrontistery.info/t.html

Trefoil

Three-lobed opening or arch.
Found on http://www.encyclo.co.uk/local/21096

trefoil

three-lobed or three-leaved motif
Found on http://www.castles-of-britain.com/glossary.htm

Trefoil

Three-lobed.
Found on http://www.castlesontheweb.com/glossary.html

Trefoil

Three-lobed.
Found on http://www.encyclo.co.uk/local/20018

trefoil

trefoil (trē'foil) [O.Fr.,=three-leaf], in botany, name for several plants, chiefly of the pulse family, having trifoliate leaves. Best known of the trefoils is clover. The bird's-foot trefoil (Lotus corniculatus) is an Old World forage plant and weed that has been naturalized in North Ame...
Found on http://www.infoplease.com/ce6/sci/A0849348.html
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