from The American Heritage® Dictionary of the English Language, 4th Edition
- n.pl. Greek Mythology The seven daughters of Atlas (Maia, Electra, Celaeno, Taygeta, Merope, Alcyone, and Sterope), who were metamorphosed into stars.
- n.pl. An open star cluster in the constellation Taurus, consisting of several hundred stars, of which six are visible to the naked eye.
from Wiktionary, Creative Commons Attribution/Share-Alike License
- proper n. The "seven sisters", companions of Artemis and daughters of the Titan Atlas and the sea-nymph Pleione.
- proper n. An open cluster of hot blue stars in the constellation Taurus, and the most easily visible such cluster from Earth.
from the GNU version of the Collaborative International Dictionary of English
- n.pl. The seven daughters of Atlas and the nymph Pleione, fabled to have been made by Jupiter a constellation in the sky.
- n.pl. A group of small stars in the neck of the constellation Taurus; -- called also the seven sisters.
from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
- n. a star cluster in the constellation Taurus
- n. (Greek mythology) 7 daughters of Atlas and half-sisters of the Hyades; placed among the stars to save them from the pursuit of Orion
Middle English Pliades, from Latin Plēïades, from Greek Plēiades.(American Heritage® Dictionary of the English Language, Fourth Edition)
From Latin Pleiades, from Ancient Greek Πλειάδες. (Wiktionary)