Etymology and origin of the Portuguese word piolho
- Confidence
- Established
- Formation
- Inherited
- First attested
- 1300s Horto do Esposo, spelt peolho More words from the 14th century
- Inherited from
- Latin peduclus
- Ultimate origin
- Latin pēdis
Derivations
Forms
piolho m (plural piolhos)[1] Old Portuguese wrote peolho in the 14th century, then piolho and pyolhos in the 15th.[2][3]
Etymology
It is inherited from Late Latin peduclus, from peduculus, a form of pēdīculus (“louse”), the diminutive of pēdis (“louse”).[2][3][4][1] Nascentes notes that the Latin diminutive suffix was exchanged in the popular form.[5] The same Latin word is Galician piollo, Spanish piojo, Catalan poll, French pou, Italian pidocchio and Romanian păduche.[1][6]
De Vaan reconstructs *pezd- and a Proto-Indo-European word for an annoying insect, and compares an Avestan name of an insect that harms horses.[7] Wiktionary also gives the root as *pezd-, but calls the origin of the Latin noun uncertain.[1] Aurélio connects the diminutive with pēs (“foot”), a view Wiktionary records as one of two explanations.[8][1]
Earliest recorded meaning
Cunha's earliest record is peolho in the Horto do Esposo, which he dates to the 14th century.[3] Houaiss also dates the plural peolhos to the 14th century.[2]
Semantic evolution
Cardoso, Barbosa and Pereira render the word by Latin pediculus.[9][10][11] Bluteau calls the louse the companion of poverty and the lasting guest of beggars.[12] Morais's edition of 1813 notes that in Brazil horses suffer from lice, and records the phrase meter-se como piolho em costura “to get in like a louse in a seam”, of someone who intrudes where he is not wanted.[13]
The name was extended to the plant lice, to mites and other small pests, and in Brazil to a tree and to the rêmora, a fish that clings to sharks.[2][14][15] The printers use it for a small misprint, the shoemakers for a tiny nail, and in the Azores chuva de piolho is a fine drizzling mist.[8][16][14]
Timeline
- 14th century – peolho in the Horto do Esposo.[3]
- 15th century – the spellings piolho and pyolhos.[2]
- 1569 – Cardoso renders piolho by Latin pediculus.[9]
- 1611 – Barbosa adds erva piolheira, the plant stavesacre.[10]
- 1789 – Morais defines it as an insect bred on the head and body of unclean people.[17]
- 1813 – meter-se como piolho em costura.[13]
- 1858 – first record of piolhento.[3]
Meanings
Noun
- louse: any of the wingless insects that live as parasites on mammals and birds, especially the head louse and the body louse of humans.[2][8][1]
- (Brazil) A loose name for various mites and small insect pests of plants and poultry; pulgão.[2][18]
- (Pernambuco) The remora, rêmora.[2][15]
- (Brazil) A tree of the genus Casearia.[2][16]
- (printing) A small misprint missed in proofreading.[8][16]
- A small tack used by shoemakers.[19][16]
- (Azores) fog, fine mist.[1][14]
Word family
- piolhento
- piolhoso
- piolheira
- espiolhar
- piolho-da-cabeça
- piolho-de-cobra
Related words
Usage notes
Meter-se como piolho em costura means to turn up everywhere uninvited.[20][13]
References
- ^ a b c d e f g h i Wiktionary, the free dictionary, https://en.wiktionary.org
- ^ a b c d e f g h i Houaiss, Antônio; Villar, Mauro de Salles (2001), Dicionário Houaiss da língua portuguesa, Rio de Janeiro: Objetiva, p. s.v. piolho
- ^ a b c d e Cunha, Antônio Geraldo da (2010), Dicionário etimológico da língua portuguesa, 4th ed., Rio de Janeiro: Lexikon, p. s.v. piolho
- ^ Nascentes, Antenor (1966), Dicionário etimológico resumido, Rio de Janeiro: Instituto Nacional do Livro, p. s.v. piolho
- ^ Nascentes, Antenor (1955), Dicionário etimológico da língua portuguesa, vol. 1: Nomes comuns, Rio de Janeiro (1st ed. 1932, preface by W. Meyer-Lübke), p. 399
- ^ Corominas, Joan (1973), Breve diccionario etimológico de la lengua castellana, 3rd ed., Madrid: Gredos, p. s.v. piojo
- ^ 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 Ferreira, Aurélio Buarque de Holanda, Novo dicionário Aurélio da língua portuguesa, digital edition, p. s.v. piolho
- ^ a b Cardoso, Jerónimo (1569–1570), Dictionarium ex lusitanico in latinum sermonem, Lisboa: João Álvares (CLP transcription, Universidade de Aveiro), p. s.v. piolho
- ^ a b Barbosa, Agostinho (1611), Dictionarium lusitanicolatinum, Braga: Fructuoso Lourenço de Basto (CLP transcription, Universidade de Aveiro), p. s.v. piolho
- ^ Pereira, Bento (1697), Thesouro da lingoa portuguesa, in the 1697 edition of his Prosodia (1st ed. 1647; CLP transcription, Universidade de Aveiro), p. s.v. piolho
- ^ Bluteau, Raphael (1712–1728), Vocabulario portuguez e latino, 8 vols. + 2 supplement vols., Coimbra / Lisboa (CLP transcription, Universidade de Aveiro), p. s.v. piolho
- ^ a b c Silva, António de Morais (1813), Diccionario da lingua portugueza, 2nd ed., 2 vols., Lisboa: Typographia Lacerdina, p. 2, 454
- ^ a b c Aulete, Francisco Júlio Caldas, Dicionário contemporâneo da língua portuguesa (1st ed. 1881), online as Aulete Digital, Rio de Janeiro: Lexikon, https://aulete.com.br, p. s.v. piolho
- ^ a b Navarro, Fred (2004), Dicionário do Nordeste, São Paulo: Estação Liberdade, p. s.v. piolho
- ^ a b c d Michaelis: Moderno Dicionário da Língua Portuguesa, São Paulo: Melhoramentos (online as Michaelis Dicionário Brasileiro da Língua Portuguesa, https://michaelis.uol.com.br), p. s.v. piolho
- ^ Silva, António de Morais (1789), Diccionario da lingua portugueza composto pelo padre D. Rafael Bluteau, reformado, e accrescentado, 2 vols., Lisboa: Simão Thaddeo Ferreira, p. 2, 204
- ^ Academia das Ciências de Lisboa, Dicionário da Língua Portuguesa, revised online edition (2023–) of the Dicionário da Língua Portuguesa Contemporânea (2001), https://dicionario.acad-ciencias.pt, p. s.v. piolho
- ^ Dicionário Priberam da Língua Portuguesa, Lisboa: Priberam Informática, https://dicionario.priberam.org, p. s.v. piolho
- ^ Porto Editora (2013), Grande Dicionário da Língua Portuguesa, Porto: Porto Editora, p. 7199
Related etymologies
Cite this entry
“Piolho.” Etymologically, 15 Nov. 2026, etymologically.com/pt/piolho. Accessed 16 Nov. 2026.
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