Apparently from πλέω (pléō, “to sail”) because of the star cluster’s importance in delimiting the sailing season in the Mediterranean Sea: "the season of navigation began with their heliacal rising". The mythological sisters were probably named after the star cluster, rather than vice versa.
The singular Πλειάς (Pleiás) is sometimes found referring to the star cluster.
Πλειάδες • (Pleiádes) f pl (genitive Πλειάδων); third declension
Case / # | Plural | ||||||||||||
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Nominative | αἱ Πλειᾰ́δες hai Pleiắdes | ||||||||||||
Genitive | τῶν Πλειᾰ́δων tôn Pleiắdōn | ||||||||||||
Dative | ταῖς Πλειᾰ́σῐ / Πλειᾰ́σῐν taîs Pleiắsĭ(n) | ||||||||||||
Accusative | τᾱ̀ς Πλειᾰ́δᾰς tā̀s Pleiắdăs | ||||||||||||
Vocative | Πλειᾰ́δες Pleiắdes | ||||||||||||
Notes: |
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Ancient Greek Πλειάδες (Pleiádes), possibly from πλέω (pléō, “to sail”), or possibly from a plural of πέλεια (péleia, “dove”).
Πλειάδες • (Pleiádes) f pl
singular | plural | |
---|---|---|
nominative | Πλειάδα (Pleiáda) | Πλειάδες (Pleiádes) |
genitive | Πλειάδας (Pleiádas) | Πλειάδων (Pleiádon) |
accusative | Πλειάδα (Pleiáda) | Πλειάδες (Pleiádes) |
vocative | Πλειάδα (Pleiáda) | Πλειάδες (Pleiádes) |