Triquetrous definitions

triquetrous

more or less triangular in cross-section, but acutely angled (with 3 distinct longitudinal ridges); cf. trigonus.
Found on http://en.wikipedia.org/wiki/Glossary_of_botanical_terms

acutely 3-angled; triangular in cross-section with concave faces and each corner projected outwards so that the organ has three distinct longitudinal ridges
Found on http://florabase.dpaw.wa.gov.au/help/glossary

Triquetrous

triangular in cross-section
Found on http://orchidfetish.com/glossary.html

Triquetrous

• (a.) Three sided, the sides being plane or concave; having three salient angles or edges; trigonal.
Found on http://thinkexist.com/dictionary/meaning/triquetrous/

triquetrous

<biology> Triangular in cross-section and acutely-angled, with three distinct longitudinal ridges. ... Compare: trigonous. ... (09 Oct 1997) ...
Found on http://www.encyclo.co.uk/local/20973