LATIN DICTIONARYLexicon Latīnum
noun · masculinesecond declension

aculeolus

aculeolus m (genitive aculeolī)

Meaning

  1. masculinea little needle

Declension

declension
formsingularplural
nominativeaculeolusaculeolī
genitiveaculeolīaculeolōrum
dativeaculeolōaculeolīs
accusativeaculeolumaculeolōs
ablativeaculeolōaculeolīs
vocativeaculeoleaculeolī

ăcūlĕŏlus, i, m. dim. aculeus,
I. a little needle or pin: aculeolos in cochleare tulit, an old reading in Mart. 8, 71, where now acu levius vix cochleare, is read.

Origins

Proto-Indo-European *-lós Proto-Indo-European *-elós Proto-Italic *-elos Latin -ulus Latin -olus Latin aculeolus From aculeus + -olus.

Quick answers

What does aculeolus mean in Latin?
aculeolus, a noun, means “a little needle”.
What is the genitive of aculeolus?
The genitive singular is aculeolī. aculeolus is masculine, second declension.