castor

== English == === Pronunciation === (Received Pronunciation) IPA(key): /ˈkɑːs.tə/ (General American) IPA(key): /ˈkæs.tɚ/ Rhymes: -ɑːstə(ɹ), -æstə(ɹ) Homophone: caster === Etymology 1 === From Middle French castor, from Old French castor (“beaver”), from Latin castor (“beaver”), from Ancient Greek κάστωρ (kástōr), from Doric Greek κάστον (káston, “wood”). ==== Noun ==== castor (countable and uncountable, plural castors) A hat made from the fur of the beaver. A heavy quality of broadcloth for overcoats. Castoreum (bitter exudate of mature beavers). Any of various nymphalid butterflies of the genus Ariadne, of Africa and Asia. ===== Synonyms ===== (hat): beaver, castoreum (archaic) (cloth): beaver ===== Derived terms ===== ===== Related terms ===== castorette castoreum ===== Translations ===== ===== See also ===== === Etymology 2 === Named from Greek mythology; see Castor and Pollux. The name pollux was given to another mineral with which it was always found. ==== Noun ==== castor (uncountable) (mineralogy) A variety of petalite found in Elba. ===== Synonyms ===== castorite === Etymology 3 === Alternative spelling of caster, via cast +‎ -or (the Latinate varient of -er). ==== Noun ==== castor (plural castors) (especially UK) Alternative spelling of caster, especially in its senses A pivoting roller attached to the bottom of furniture to allow it to be moved. A container with a perforated cap for sprinkling its contents, especially salt, pepper, etc. ===== Derived terms ===== castor sugar castored castoring === References === “castor”, in Webster’s Revised Unabridged Dictionary, Springfield, Mass.: G. & C. Merriam, 1913, →OCLC. === Anagrams === Castro, Cators, Croats, acrost, actors, co-star, costar, scroat, scrota, tarocs == Asturian == === Noun === castor m (plural castores) beaver == Catalan == === Etymology === Borrowed from Latin castŏrem. === Pronunciation === IPA(key): (Northern) [kəsˈtu] IPA(key): (Balearic, Central) [kəsˈto] IPA(key): (Valencia) [kasˈtoɾ] IPA(key): (Northwestern) [kasˈto] === Noun === castor m (plural castors) beaver === Further reading === “castor”, in Diccionari de la llengua catalana [Dictionary of the Catalan Language] (in Catalan), second edition, Institute of Catalan Studies [Catalan: Institut d'Estudis Catalans], April 2007 == French == === Etymology === Inherited from Middle French castor, from Old French castor, borrowed from Latin castor, itself from Ancient Greek κάστωρ (kástōr). Though borrowed into French early on, the word remained a more learned term at first, while bièvre was the popular synonym. === Pronunciation === IPA(key): /kas.tɔʁ/ Homophone: castors === Noun === castor m (plural castors) beaver (aquatic mammal) Synonym: (archaic) bièvre castor (hat made from beaver fur) ==== Derived terms ==== === Further reading === “castor”, in Trésor de la langue française informatisé [Digitized Treasury of the French Language], 2012 === Anagrams === scorât == Galician == === Etymology === From Latin castor (“beaver”). === Pronunciation === IPA(key): /kasˈtoɾ/ === Noun === castor m (plural castores) beaver Synonym: befre === Further reading === “castor”, in Dicionario da Real Academia Galega (in Galician), A Coruña: Royal Galician Academy, 2012–2026 == Latin == === Etymology === From Ancient Greek κάστωρ (kástōr), from Doric Greek κάστον (káston, “wood”). See also Sanskrit कस्तूरी (kastūrī, “musk”). === Pronunciation === (Classical Latin) IPA(key): [ˈkas.tɔr] (modern Italianate Ecclesiastical) IPA(key): [ˈkas.tor] === Noun === castor m (genitive castoris); third declension beaver ==== Declension ==== Third-declension noun. ==== Synonyms ==== fiber, beber (Late Latin) ==== Derived terms ==== castoreātus castoreum castorīnātus castorīnus ==== Related terms ==== Castor ==== Descendants ==== === See also === Castor === References === “castor”, in Charlton T. Lewis and Charles Short (1879), A Latin Dictionary, Oxford: Clarendon Press “castor”, in Charlton T. Lewis (1891), An Elementary Latin Dictionary, New York: Harper & Brothers "castor", in Charles du Fresne du Cange, Glossarium Mediæ et Infimæ Latinitatis (augmented edition with additions by D. P. Carpenterius, Adelungius and others, edited by Léopold Favre, 1883–1887) “castor”, in Gaffiot, Félix (1934), Dictionnaire illustré latin-français, Hachette. “castor”, in Harry Thurston Peck, editor (1898), Harper’s Dictionary of Classical Antiquities, New York: Harper & Brothers “castor”, in William Smith, editor (1848), A Dictionary of Greek and Roman Biography and Mythology, London: John Murray === Anagrams === Arctos == Norman == === Etymology === Borrowed from French castor, from Latin castor (“beaver”). === Noun === castor m (plural castors) (Jersey) beaver == Portuguese == === Etymology === Learned borrowing from Latin castōrem (“beaver”), from Ancient Greek κάστωρ (kástōr). === Pronunciation === Rhymes: -oɾ Hyphenation: cas‧tor === Noun === castor m (plural castores) beaver (Castor sp.) fur of a beaver castor (a hat made from the fur of the beaver) ==== Derived terms ==== === Further reading === “castor”, in Dicionário Aulete Digital (in Portuguese), Rio de Janeiro: Lexikon Editora Digital, 2008–2026 “castor” in Dicionário Aberto based on Novo Diccionário da Língua Portuguesa de Cândido de Figueiredo, 1913 “castor”, in Michaelis Dicionário Brasileiro da Língua Portuguesa (in Portuguese), São Paulo: Editora Melhoramentos, 2015–2026, →ISBN “castor”, in Dicionário Priberam da Língua Portuguesa (in Portuguese), Lisbon: Priberam, 2008–2026 == Romanian == === Etymology === Borrowed from French castor and its source, Latin castor, from Ancient Greek κάστωρ (kástōr). === Noun === castor m (plural castori) beaver Synonyms: breb (“European beaver”); (less common) biber ==== Declension ==== === Further reading === “castor”, in DEX online—Dicționare ale limbii române (Dictionaries of the Romanian language) (in Romanian), 2004–2026 == Spanish == === Etymology === From Latin castor (“beaver”). === Pronunciation === IPA(key): /kasˈtoɾ/ [kasˈt̪oɾ] Rhymes: -oɾ Syllabification: cas‧tor === Noun === castor m (plural castores) beaver === Further reading === “castor”, in Diccionario de la lengua española [Dictionary of the Spanish Language] (in Spanish), online version 23.8.1, Royal Spanish Academy [Spanish: Real Academia Española], 15 December 2025