τεταρτημόριον
tetartēmorion

Greek noun

Last edited: 2025-02-03
Primary meaning segment of 3 zodiac signs
Literal translation fourth part
Variants
τεταρτημόριον tetartēmorion
Edited by
segment of 3 zodiac signs astral concept

i.e. quarter of the zodiac

Ἐπιζητεῖται δὲ ἐν τούτοις, πῶς ἴσων ὄντων τῶν τεταρτημορίων τοῦ ζῳδιακοῦ κύκλου ὁ ἥλιος ἰσοταχῶς κινούμενος διὰ παντὸς ἐν ἀνίσοις χρόνοις διαπορεύεται τὰς ἴσας περιφερείας.

‘And it is a matter of question concerning these things: how - while the fourth parts of the zodiac are equal - does the sun, moving through each of them at constant speed, pass equal arcs in unequal times?’

— Geminus 1.18

Genre: astronomy
Date: 1st century BCE

Geminus. 1975. Géminos, Introduction aux Phénomènes, ed. G. Aujac. Paris: Les Belles Lettres. 5

Right before this passage, Geminus discusses the intervals of time between the solstices and the equinoxes. Each of these 4 intervals consists of the amount of time during which the sun passes not just through a quarter of the zodiac, but through 3 specified entire zodiac signs.
Cite this entry
APA (7th)
Peeters, T. (2025). τεταρτημόριον (Lemma #1291). The ZODIAC Glossary: A Cross-Cultural Glossary of Ancient Astral Science. https://zodiacglossary.github.io/lemma/1291/
Chicago (Author-Date)
Peeters, T. (2025). τεταρτημόριον (Lemma #1291). The ZODIAC Glossary: A Cross-Cultural Glossary of Ancient Astral Science. https://zodiacglossary.github.io/lemma/1291/
MLA (9th)
Peeters, T. (2025). τεταρτημόριον (Lemma #1291). The ZODIAC Glossary: A Cross-Cultural Glossary of Ancient Astral Science. https://zodiacglossary.github.io/lemma/1291/
Harvard
Peeters, T. (2025) τεταρτημόριον (Lemma #1291), The ZODIAC Glossary: A Cross-Cultural Glossary of Ancient Astral Science. Available at: https://zodiacglossary.github.io/lemma/1291/ (Accessed: December 1, 2025).
BibTeX 
@misc{zodiac1291,
	note = {[Online; accessed 2025-12-01]},
	author = {Peeters, Thomas},
	year = {2025},
	title = {τεταρτημόριον ({Lemma} #1291)},
	url = {https://zodiacglossary.github.io/lemma/1291/},
	howpublished = {https://zodiacglossary.github.io/lemma/1291/},
}