tripinnate


Also found in: Dictionary, Thesaurus, Encyclopedia, Wikipedia.
Related to tripinnate: bipinnate

tripinnate

(trī-pĭn′āt′)
adj.
Having bipinnate leaflets or lobes that are themselves pinnately divided, as in the fronds of certain ferns.

tri·pin′nate′ly adv.
The American Heritage® Medical Dictionary Copyright © 2007, 2004 by Houghton Mifflin Company. Published by Houghton Mifflin Company. All rights reserved.
References in periodicals archive ?
The gill consists of three tripinnate branchial leaves arranged perpendicularly to the body, located about halfway down the body in the dorsal midline.
Inflorescence bipinnate to laxly tripinnate with 6 to 12 primary branches, the main axis flexuose; primary bracts elliptic, acute, 25-40 x 5-9 mm, somewhat cucculate, nerved, sparsely punctate-lepidote, red, all much shorter than the branches; primary branches with a slender 2-10 mm peduncle, the lowest primary branches rarely with up to 6 subsessile 2 to 10-flowered secondary branches, otherwise the primary branches cylindrical, 4-12 cm long, 8 to 15-flowered; floral bracts elliptic, acute, 13-17 mm long, somewhat cucculate, thin coriaceous, nerved, the proximal ones somewhat carinate, spreading at anthesis usually red or rarely red tipped white or yellow.
Inflorescence bipinnate to inconspicuously tripinnate, obconic-rosulate, substellate at the apex, ca.
Inflorescence laxly paniculate, broadly pyramidate, tripinnate at base and bipinnate toward the apex, 65-70 cm long, 20-45 cm in diameter at base, erect, rachis white lanate but soon glabrous, dark purple-wine, rugulose, straight to slightly flexuous near the apex, 1-1.8 mm in diameter, internodes 3-7 cm long; primary bracts resembling the upper scape-bracts but smaller, narrowly subtriangular-lanceolate, acuminate-caudate, 3.5-15 cm long, 1.5-2.5 cm wide at base, entire, stramineous, thinly coriaceous, coarsely nerved, soon glabrous, suberect to spreading with the branches, equaling to exceeding the naked stipes, the upper ones pungent; primary branches suberect to spreading, the basal ones ca.
e.j.gouda@uu.nl term correct application anterior applicable only in strongly zygomorphic flowers, but even there it remains doubtful posterior see anterior pinnate description of compound leaves with leaflets arranged on opposite sides of an elongated axis or of a certain venation pattern bipinnate twice pinnate (leaves), see above tripinnate pinnately compound three times, with pinnate pirmules (leaflets) quadripinnate pinnately compound four times, with nate pinnules (leaflets) scape leafless peduncle arising from ground level (usually from a basal rosette) in acaulescent plants (e.g.