trigone

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trigone

[′trī‚gōn]
(anatomy)
A triangular area inside the bladder limited by the openings of the ureters and urethra.
(botany)
A thickening of plant cell walls formed when three or more cells adjoin.
References in periodicals archive ?
25-40 [micro]m wide in midleaf, thinwalled, without or with very small trigones; cuticle smooth.
ovata are orbicular (not ovate-oblong), distinctly ventrad and toothed all around by numerous small teeth (more than 100), and the leaf cells have large trigones. Plagiochila ovata occurs at somewhat higher elevation than P.
35-55 [micro]m wide in midleaf, slightly elongate, with small radiate trigones; cuticle smooth.
15-30 [micro]m wide, trigones conspicuous, often large; leaf base with a distinct vitta; cuticle [+ or -] smooth.
15-30 [micro]m wide) with large trigones, and an almost smooth cuticle.
35-55 [micro]m wide in midleaf, slightly elongate, with small radiate trigones; leaf base with a vitta; cuticle smooth.
Leaf cells rather small, 15-30 [micro]m wide in midleaf, walls flexuose with small to somewhat swollen trigones, leaf border lacking, leaf base without vitta; cuticle smooth.
Leaf cells subisodiametric, 20-30 [micro]m wide in midleaf, trigones small to large, not elongate along the cellwalls, cuticle smooth; leaf base with a short vitta.
18-25 [micro]m wide in midleaf, somewhat elongate, with rather large, radiate trigones; cuticle smooth.
20-25 [micro]m wide in midleaf, trigones large, cuticle smooth.
Leaf cells isodiametrical to somewhat elongate, 1-1.5x longer than wide, 20-32 [micro]m wide in midleaf, thin-walled with small trigones; cuticle smooth.
Leaf cells isodiametric to elongate, 15-28 [micro]m wide in midleaf, trigones conspicuous, elongate, on longer walls often subconfluent; cuticle smooth.