Pluto Definition

plo͝otō

noun

The god ruling over the lower world.

Webster's New World

A large dwarf planet orbiting beyond Neptune: diameter, c. 2,270 km (c. 1,410 mi); period of revolution, c. 248.59 earth years; period of rotation (retrograde), 6.39 earth days; three satellites; symbol, ♇: formerly classified as the ninth major planet.

Webster's New World

The god of the dead and the ruler of the underworld, identified with the Greek Hades.

American Heritage

Synonyms:

Synonyms:
aidoneus
hades
aides

pronoun

(astronomy) Originally known as the ninth planet but reclassified in 2006 as a dwarf planet, the brightest and first known Kuiper belt object, represented by the symbol ♇ in astronomy and in astrology.

Wiktionary

(Greek mythology, Roman mythology) Greco-Roman god of the underworld.

Wiktionary

verb

(neologism) To demote or devalue something.

Wiktionary

prefix

Forming compound words relating to wealth or money.

Wiktionary

Origin of Pluto

Latin Plūtō Plūtōn- from Greek Ploutōn from ploutos wealth (from the belief that the underworld was the source of wealth from the ground) pleu- in Indo-European roots

From American Heritage Dictionary of the English Language, 5th Edition
Originally coined in 2006 by the American Dialect Society, defeating climate canary. Was believed by many to be a self-promotion attempt.

From Wiktionary
From combining form of Ancient Greek πλοῦτος (ploutos, “wealth, riches”).

From Wiktionary
Ancient Greek Πλούτων (Plutōn)

From Wiktionary