lacertus
Etymology and origin of the Latin word lacertus
Pronunciation
Forms
lacertus m (genitive lacertī); second declension[1]
Etymology
The origin is uncertain.[2][1] Pokorny proposed a connection with Ancient Greek λάξ (láx, “with the foot”) and Old Norse leggr (“leg”), and Walde and Hofmann with Ancient Greek λικερτίζειν (likertízein, “to jump, dance”); de Vaan finds none of these semantically convincing.[2][3][4] The TLL suggests that, in the sense “muscle”, it may be the same word as lacertus “lizard” (see lacerta), just as musculus “muscle” is literally “little mouse”.[5][1] Isidore of Seville already explained the muscles as named after small animals hiding under the skin.[5]
Earliest recorded meaning
It is first found in Lucilius, in the late 2nd century BC,[2][6] who mentions a bag tied to the arm.[3]
Semantic evolution
It meant the muscular upper arm, from shoulder to elbow, as opposed to the forearm (bracchium), and more loosely the arm, especially in embraces and in throwing weapons.[3][7] The TLL notes that it was a favourite word of the poets, especially Ovid.[5] In the plural it meant muscles in general, and figuratively strength or “muscle”, as when Cicero speaks of the vigour of an orator's style.[3][8] Ovid uses it once for an arm of a river.[3]
Late Latin used it for a muscle in general.[1]
Timeline
- c. 180–102 BC – Lucilius uses it for the upper arm.[3][6]
- 96–55 BC – Lucretius uses it of arms strengthened for throwing.[3][6]
- 81–43 BC – Cicero uses it for the strength of an orator.[3][6]
- 43 BC–18 AD – Ovid uses it for the arms in an embrace and for an arm of a river.[3][6]
Meanings
Noun
- The upper arm; the arm.[3][7]
- (plural) Muscles; figuratively, strength, vigour.[3][8]
- An arm (of a river).[3]
- (Late Latin) A muscle.[1]
Word family
- lacertulus
- lacertōsus
Related words
- lacerta
- English alligator
Usage notes
A homograph lacertus, a by-form of lacerta, means a lizard and a kind of mackerel.[3][8] Through Spanish el lagarto “the lizard” it is the source of English alligator.[9]
References
- ^ a b c d e f g Wiktionary, the free dictionary, https://en.wiktionary.org
- ^ a b c de Vaan, Michiel (2008), Etymological Dictionary of Latin and the other Italic Languages, Leiden Indo-European Etymological Dictionary Series 7, Leiden; Boston: Brill
- ^ a b c d e f g h i j k l m Glare, P. G. W., ed. (2012), Oxford Latin Dictionary, 2nd ed., Oxford: Oxford University Press
- ^ Pokorny, Julius (1959), Indogermanisches etymologisches Wörterbuch, Bern; Munich: Francke
- ^ a b c Thesaurus linguae Latinae (1900–), Leipzig: Teubner; Berlin: De Gruyter; open-access ed., Munich: Bayerische Akademie der Wissenschaften
- ^ a b c d e Köbler, Gerhard (2010), Lateinisches Abkunfts- und Wirkungswörterbuch für Altertum und Mittelalter, online ed., koeblergerhard.de
- ^ a b Lewis, Charlton T.; Short, Charles (1879), A Latin Dictionary, Oxford: Clarendon Press
- ^ a b c Georges, Karl Ernst (1913–1918), Ausführliches lateinisch-deutsches Handwörterbuch, 8th ed., ed. Heinrich Georges, Hannover; Leipzig: Hahn
- ^ Harper, Douglas, Online Etymology Dictionary, https://www.etymonline.com
Cite this entry
“Lacertus.” Etymologically, 10 Oct. 2026, etymologically.com/la/lacertus. Accessed 10 Oct. 2026.
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