a riblike part, such as the midrib of a plant leaf
Derived forms
costal (ˈcostal)
adjective
costally (ˈcostally)
adverb
Word origin
C19: from Latin: rib, side, wall
Examples of 'costae' in a sentence
costae
It can also be distinguished by its large primary order costae and variable colouration.
Bert Hoeksema 2014, 'The “Fungia patella group” (Scleractinia, Fungiidae) revisited with a descriptionof the mini mushroom coral Cycloseris boschmai sp. n.', ZooKeyshttp://zookeys.pensoft.net/lib/ajax_srv/article_elements_srv.php?action=download_pdf&item_id=3217. Retrieved from DOAJ CC BY 4.0 (https://creativecommons.org/licenses/by-sa/4.0/legalcode)
Numerous pits on the costae and costal spines are spinulose.
T. Mondal, C. Raghunathan 2013, 'Description of a new coral species Ctenactis triangular is (Scleractinia: Fungiidae)from Andaman Islands, India', Journal of Threatened Taxahttp://threatenedtaxa.org/index.php/JoTT/article/view/1039. Retrieved from DOAJ CC BY 4.0 (https://creativecommons.org/licenses/by-sa/4.0/legalcode)
They are distributed on veins, interveinal regions, and leaf margins, but not on costules, costae, and false indusia.
Tzu-Tong Kao, Shiang-Jiuun Chen, Wen-Liang Chiou, Yi-Chun Chuang, Ling-Long Kuo-Huang 2008, 'Various Microscopic Methods for Investigating the Venuloid Idioblasts of Pteris grevilleanaWall.', Taiwaniahttp://tai2.ntu.edu.tw/taiwania/abstract.php?type=abstract&id=793. Retrieved from DOAJ CC BY 4.0 (https://creativecommons.org/licenses/by-sa/4.0/legalcode)
Hand made transverse sections of young and adult stipes, and costae were done in fresh and restored herbarium material.
Jose María Gabriel y Galán, Lilian M Passarelli, Carmen Prada, Cristina H Rolleri 2008, 'Sporophyte morphology and gametophyte development of the fern Blechnum sprucei (Pteridophyta:Blechnaceae)', Revista de Biología Tropicalhttp://www.scielo.sa.cr/scielo.php?script=sci_arttext&pid=S0034-77442008000400034. Retrieved from DOAJ CC BY 4.0 (https://creativecommons.org/licenses/by-sa/4.0/legalcode)