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n. pl. cos·tae (-tē) Biology
A rib or a riblike part, such as the midrib of a leaf or a thickened anterior vein or margin of an insect's wing.

[Latin; see kost- in Indo-European roots.]

cos′tal adj.


n, pl -tae (-tiː)
1. (Anatomy) the technical name for rib11
2. (Biology) a riblike part, such as the midrib of a plant leaf
[C19: from Latin: rib, side, wall]
ˈcostal adj
ˈcostally adv


(ˈkɒs tə, ˈkɔ stə)

n., pl. cos•tae (ˈkɒs ti, ˈkɔ sti)
1. a rib, riblike structure, or ridge.
a. Also called cos′tal vein′. a vein, usu. marginal, in the front part of the wing of certain insects.
b. Also called cos′tal mar′gin. the anterior edge or border of the wing of certain insects.
[1865–70; < Latin: rib, side. compare coast]


- A rib or riblike structure.
See also related terms for rib.
ThesaurusAntonymsRelated WordsSynonymsLegend:
Noun1.costa - a riblike part of a plant or animal (such as a middle rib of a leaf or a thickened vein of an insect wing)
anatomical structure, bodily structure, body structure, complex body part, structure - a particular complex anatomical part of a living thing; "he has good bone structure"
2.costa - any of the 12 pairs of curved arches of bone extending from the spine to or toward the sternum in humans (and similar bones in most vertebrates)
craniate, vertebrate - animals having a bony or cartilaginous skeleton with a segmented spinal column and a large brain enclosed in a skull or cranium
bone, os - rigid connective tissue that makes up the skeleton of vertebrates
true rib - one of the first seven ribs in a human being which attach to the sternum
costal cartilage - the cartilages that connect the sternum and the ends of the ribs; its elasticity allows the chest to move in respiration
References in periodicals archive ?
De hecho, en octubre de 1995 un terremoto con epicentro a 200 kilometros de la costa, origino un maremoto que afecto las costas de Jalisco y Col.
A mas de 300 kilometros de las costas africanas, esto era una autentica prision natural y los esclavos llegaban por miles.
The Spanish government fear a cell of the Basque separatist group ETA have moved to the Costas.
Orlando Costas left the church universal an invaluable legacy by his short but intense missionary life (1942-87).
The first child of Costas and Elena Lazarou, Bavlos was born at 10.
Costas, 48, from Danescourt said: "All the nurses had him down for being the first born of the new year.
Boboi Costas, Cebu provincial tourism officer, who just came back from a Global Eco-Asia Pacific Tourism Conference in Adelaide, Australia, where he presented Cebu's eco-tourism thrust, noted several tourism practices discussed in the forum that could be adopted in Cebu.
Veteran sportscaster Bob Costas on Monday offered a sharp rebuke to the notion that the American flag should only be viewed as a symbol for the U.
The hour-long award ceremony will start at 7pm with opening speeches by Executive Director of CVAR Dr Rita C Severis, member of the Board of Directors of the Costas and Rita Severis Foundation Dr Ayla Gurel, Secretary General of Europa Nostra Sneska Quaedvlieg-Mihailovic and education minister Costas Kadis.
Cyprus Education Minister Costas Kadis and Russian Education and Science Minister Olga Vasilyeva inked an agreement in the areas of education and sciences.
t Raiders broke into Stourport's Riverside Fish Bar - a business set up by Louis Costas 35 years ago - in the early hours of last Sunday.
L'ancien secretaire general de la Federation des iles Caimans de football (CIFA) Costas Takkas, egalement ancien collaborateur du president de la Concacaf, a ete extrade mardi vers les Etats-Unis, a annonce l'Office federal suisse de la justice.