triquetrous

American  

[trahy-kwee-truhs, -kwe-] / traɪˈkwi trəs, -ˈkwɛ- /

adjective

1. three-sided; triangular.

2. having a triangular cross section.

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triquetrous British  

/ -ˈkwɛt-, traɪˈkwiːtrəs /

adjective

1. triangular, esp in cross section

   a triquetrous stem

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Other Word Forms

• subtriquetrous adjective

Etymology

Origin of triquetrous

1650–60; < Latin triquetrus triangular, equivalent to tri- tri- + -quetrus cornered

Example Sentences

Capsule membranous, elliptical, acutish at each end or shortly stipitate, triquetrous and acutely winged, very tardily dehiscent.

From Project Gutenberg

Style mostly 3-parted and achene triangular or triquetrous.

From Project Gutenberg

Decumbent, pinnately branching, the short fertile branch lateral; leaves subvertical, suborbicular, obtuse, entire; lower lobe obovate-cucullate or galeate, subappressed; underleaves cordate or rounded, sinuate-subdentate, slightly bifid; perianth oblong, triquetrous, convex dorsally, strongly keeled ventrally.—On rocks and trees, N. Y. to Ohio, and southward; rather common.

From Project Gutenberg

Procumbent, widely branching or subpinnate; leaves orbicular, subimbricate; lower lobe very small, as broad as long, close to the stem; underleaves rather large, flat, rounded, slightly bifid; monœcious; perianth oblong-oval or subobovate, triquetrous, dorsally sulcate, acutely keeled ventrally; antheridial spikes globose.—Shaded rocks, N. Y. and N. J. to E. Tenn.

From Project Gutenberg

Slender, rarely forked, without runners, greenish, reddish, or often purple; leaves imbricate, ascending, obovate, concave, semicordate at base, lunately bifid below the middle, the lobes incurved or hooked; cells small, quadrate; monœcious or diœcious; involucral leaves complicate, the lobes subovate, spinulose-denticulate; perianth large, rose-purple, triquetrous, the wide mouth ciliate; calyptra thin; capsule oblong-globose.

From Project Gutenberg