1409, J. L. Pensado Tomé,Tratado de Albeitaria, Santiago de Compostela: Centro Ramón Piñeiro, page119:
ffazese nascostas do Cauallo hũa door que faz jnchaço grande et geerase daquel jnchaço carnes podres, et esto ven da sella que he maa ou do gran carrego que o preme moito, et aas vezes dura moito este jnchaço, fazese ende hũa peça de carne poçoenta que chega aos osos et sal vinino ou agooa.
There appear in thesides of the horse an ache that produces a large swelling and that swelling creates rotten flesh, and this is because of the saddle, that is of poor quality, or from the large load that presses much, and sometimes this swelling last a long time; it then appears a piece of venomous flesh that reaches the bones and pus or water comes out
Barreiro, Xavier Varela; Guinovart, Xavier Gómez (2006–2018), “costa”, inCorpus Xelmírez: corpus lingüístico da Galicia medieval [Corpus Xelmírez: linguistic corpus of Medieval Galicia] (in Galician), Santiago de Compostela:Instituto da Lingua Galega
Of uncertain origin. The term is traditionally compared withOld Church Slavonicкость(kostĭ), which may reflectProto-Indo-European*kost-.[1] though De Vaan rejects this etymology. Derksen, however, considers a relationship between this term andProto-Slavic*kostь to be "quite possible."[2] However, the connection is complicated if the Proto-Slavic term is derived from a pre-form*Host-, as such a term would not produce the Latin word. For this reason, De Vaan rejects the connection between the Slavic and Latin terms.[3]
^Derksen, Rick (2008),Etymological Dictionary of the Slavic Inherited Lexicon (Leiden Indo-European Etymological Dictionary Series; 4), Leiden; Boston: Brill,→ISBN,page239
^De Vaan, Michiel (2008), “costa”, inEtymological Dictionary of Latin and the other Italic Languages (Leiden Indo-European Etymological Dictionary Series; 7), Leiden, Boston: Brill,→ISBN,page140
“costa”, inCharlton T. Lewis and Charles Short (1879),A Latin Dictionary, Oxford: Clarendon Press
“costa”, inCharlton T. Lewis (1891),An Elementary Latin Dictionary, New York: Harper & Brothers
"costa", in Charles du Fresne du Cange’sGlossarium Mediæ et Infimæ Latinitatis (augmented edition with additions by D. P. Carpenterius, Adelungius and others, edited by Léopold Favre, 1883–1887)
