Definitions
from The American Heritage® Dictionary of the English Language, 5th Edition.
- adjective Three-sided, with sharp edges and concave sides.
from The Century Dictionary.
- Three-sided; triangular; having three plane or concave sides
from the GNU version of the Collaborative International Dictionary of English.
- adjective Three sided, the sides being plane or concave; having three salient angles or edges; trigonal.
from Wiktionary, Creative Commons Attribution/Share-Alike License.
- adjective Having three corners or sides;
triangular .
Etymologies
from The American Heritage® Dictionary of the English Language, 4th Edition
from Wiktionary, Creative Commons Attribution/Share-Alike License
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Examples
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It is a native of Albania, and belongs to that section of its extensive genus having triquetrous and obtuse leaves, or blunt three-sided foliage, as formed by a well developed keel.
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The spikelets are plano-convex, orbicular to oblong, obtuse, secund, 2-ranked on the flattened or triquetrous rachis of the spike-like branches of a raceme, one-flowered and falling off entire from the very short or obscure pedicels.
A Handbook of Some South Indian Grasses K. Rangachari
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The _inflorescence_ is a compound spike varying in length from 4 to 10 inches, erect; the main rachis is triquetrous, dorsally rounded, glabrous and very thinly scaberulous at the edges.
A Handbook of Some South Indian Grasses K. Rangachari
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The _spikes_ are usually few, 2 to 6, 3 to 6 inches long, with a triquetrous, narrowly winged rachis.
A Handbook of Some South Indian Grasses K. Rangachari
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The superior one fourth division of this stem is formed into a pyramidal spike of flowers, rather diffuse; these flowers are of the hexandria, large, and expanded; of a dark purple colour, delicately powdered with green, yellow, and red, and divided into six parts, or petals; these are succeeded by triquetrous dry pericarpi, when ripe.
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These branches, with their many subdivision, terminate in simple racemes of pale incarnate flowers, which make a fine appearance among the leaves; the flowers are succeeded by desiccated triquetrous pericarpi, each containing a single kernel.
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