What does mergulus mean in Latin?

mergulus, a noun, means “diminutive of mergus; synonym of mergus”.

What is the genitive of mergulus?

The genitive singular is mergulī. mergulus is masculine, second declension.

In classical Latin, [ˈmɛr.ɡʊ.ɫʊs]; in ecclesiastical (church) Latin, [ˈmɛr.ɡu.lus].

noun · masculinesecond declension

mergulus m (genitive mergulī)

Classical[ˈmɛr.ɡʊ.ɫʊs]Ecclesiastical[ˈmɛr.ɡu.lus]

diminutivemasculinediminutive of mergus
Late Latinmasculineproscribedsynonym of mergus
mergus non mergulus(The correct form is) mergus, not mergulus[3rd–4th century, Appendix Probi, line 194:

mergŭlus, i, m. dim. mergus,

I. a diver, a kind of bird, Vulg. Lev. 11, 17; id. Deut. 14, 17.

Diminutive from mergus (“diver, loon”) + -ulus, from mergō (“dive, plunge”).

Descendants

noun · masculinesecond declension

mergulus²

mergulus m (genitive mergulī)

Classical[ˈmɛr.ɡʊ.ɫʊs]Ecclesiastical[ˈmɛr.ɡu.lus]

mergŭlus, i, m. mergo,

I. the wick of a lamp: mergulus, ἐλλύχνιον, Gloss. Gr. and Lat.

Diminutive from mergō (“immerse, dip”) + -ulus.