σημεῖον

Ancient Greek

From σῆμᾰ (sêma, “mark, sign”) +‎ -ῐον (-ion).

σημεῖον • (sēmeîon) n (genitive σημείου); second declension

a mark, sign, token; an indication
tomb
sign from the gods, omen
1. wonder, portent
sign or signal to do a thing, made by flags
standard or flag
1. body of troops under one standard or flag
(heraldry) device upon a shield or ship; figurehead
signet on ring; figure, image
watchword, warcry
birthmark or distinguishing feature
(logic) a proof
(logic) a sign used as a probable argument in proof of a conclusion
(geometry) a point
- 350 BCE – 250 BCE, Euclid, Elements 1:
  σημεῖόν ἐστιν, οὗ μέρος οὐθέν.
  sēmeîón estin, hoû méros outhén.
  A point is that of which there is no part.
(medicine) symptom
(medicine) a kind of skin eruption
(in the plural) shorthand symbols
critical mark
(mathematics) mathematical point
point of time, instant
(prosody, music) unit of time

Case / #	Singular	Dual	Plural
Nominative	τὸ σημεῖον tò sēmeîon	τὼ σημείω tṑ sēmeíō	τᾰ̀ σημεῖᾰ tà sēmeîa
Genitive	τοῦ σημείου toû sēmeíou	τοῖν σημείοιν toîn sēmeíoin	τῶν σημείων tôn sēmeíōn
Dative	τῷ σημείῳ tôi sēmeíōi	τοῖν σημείοιν toîn sēmeíoin	τοῖς σημείοις toîs sēmeíois
Accusative	τὸ σημεῖον tò sēmeîon	τὼ σημείω tṑ sēmeíō	τᾰ̀ σημεῖᾰ tà sēmeîa
Vocative	σημεῖον sēmeîon	σημείω sēmeíō	σημεῖᾰ sēmeîa
Notes:	This table gives Attic inflectional endings. For declension in other dialects, see Appendix:Ancient Greek dialectal declension.

(antonym(s) of “a sign used as a probable argument in proof of a conclusion”): τεκμήριον (tekmḗrion)