LATIN DICTIONARYLexicon Latīnum
noun · neutersecond declension

serum

serum n (genitive serī)
Classical[ˈsɛ.rũː]Ecclesiastical[ˈsɛː.rum]

Meaning

  1. neuterwhey
    Nec tibi cūra canum fuerit postrēma, sed ūnā vēlōcis Spartae catulōs ācremque MolossumNor let the concern for your dogs be the last, but in the same way the brave Molossan and the whelps of the swift Spartan feed with fat whey.c. 37 BCE – 30 BCE, Vergilius, Georgicon 3.404–406
    Būbulī serum orthopnoicīs prōdest ante cētera additō nāsturtiō.Whey of cows is more beneficial to asthmatics than others when cress is added to it.77 CE – 79 CE, Plinius Maior, Naturalis Historia 28.130
  2. broadlyneutersome other watery liquid
    Quid dīcam, Gellī, quārē rosea ista labella hībernā fīant candidiōra nive, māne domō cum exīs et cum tē octāva quiēte ē mollī longō suscitat hōra diē? Nesciŏquid certest: an vērē fāma susurrat grandia tē mediī tenta vorāre virī? Sīc certest: clāmant Victōris rupta miselli īlia, et ēmulsō barba notāta serō. What shall I say, Gellius, how these rosy lipswhen you walk out of the house when the eighth hour rouses you from soft rest in the long day? Something's sure: perhaps your reputation whispers truthfully that you devour the large protuberance of a man's middle? So is it certain: thus the broken loins of the poor Victor cry, and the beard marked with the milked-out semen.c. 84 BCE – 54 BCE, Catullus, Carmina 80

Declension

declension
formsingularplural
nominativeserumsera
serua
genitiveserī
serūs
serōrum
seruum
dativeserō
seruī
serīs
seribus
accusativeserumsera
serua
ablativeserōserīs
seribus
vocativeserumsera
serua

sĕrum, i, n. (collat. form sĕrū, acc. to Charis. p. 23 P.) [prob. sibilated from ὀρός].
I. The watery part of curdled milk, whey, Plin. 11, 41, 96, § 239; 28, 9, 33, § 126; Col. 7, 12, 10; Verg. G. 3, 406; Tib. 2, 3, 16; Ov. F. 4, 770.—
II. Transf., like ὀρός, of the watery parts, serum, of other things; of resin, Plin. 16, 12, 23, § 60: seminis genitalis, Cat. 80, 8.

Origins

From Proto-Italic *serom (“liquid”), from Proto-Indo-European *sér-o- (“flowing, liquid”), from *ser- (“to flow, run”); cognate with Sanskrit सर (sará, “flowing”), सार (sā́ra, “curd, cream”), सारण (sāraṇa, “flowing, buttermilk”), and Ancient Greek ὀρός (orós, “whey, curd, semen”).

Descendants
  • Catalansèrum
  • Englishserum
  • Frenchsérum
  • GermanSerum
  • Italiansiero
  • Portuguesesoro
  • Romanianzer
  • Spanishsero-
  • Spanishsuero
  • Aromaniandzãr

Quick answers

What does serum mean in Latin?
serum, a noun, means “whey; some other watery liquid”.
What is the genitive of serum?
The genitive singular is serī. serum is neuter, second declension.
How do you pronounce serum?
In classical Latin, [ˈsɛ.rũː]; in ecclesiastical (church) Latin, [ˈsɛː.rum].