LATIN DICTIONARYLexicon Latīnum
noun · neutersecond declension

glaesum

glaesum n (genitive glaesī)

Meaning

  1. neuteramber (fossil resin)

Declension

declension
formsingularplural
nominativeglaesumglaesa
glēsa
genitiveglaesī
glēsī
glaesōrum
glēsōrum
dativeglaesō
glēsō
glaesīs
glēsīs
accusativeglaesumglaesa
glēsa
ablativeglaesō
glēsō
glaesīs
glēsīs
vocativeglaesumglaesa
glēsa

glaesum (glēsum, glessum), i, n. cf. Germ. Glas; gleissen = glänzen, to glimmer; Engl. glass,
I. amber, Tac. G. 45; Plin. 37, 3, 11, § 42.—Hence, glaesārĭus, a, um, adj., of amber, amber-: insula, which produces amber, Plin. 4, 13, 27, § 97; 37, 3, 11, § 42.

Origins

Borrowed from Proto-Germanic *glasą, possibly related root *glōaną (“to shine”) (compare glow), and ultimately from the Proto-Indo-European root *ǵʰel- (“to shine, shimmer, glow”). An ancient theory by Tacitus claims this word to be a Latinization of what the Aestii, likely a Baltic people, call amber; compare Latvian dziñtars, Lithuanian giñtaras (“amber”).

Quick answers

What does glaesum mean in Latin?
glaesum, a noun, means “amber (fossil resin)”.
What is the genitive of glaesum?
The genitive singular is glaesī. glaesum is neuter, second declension.