Amalthea

play
noun Am·al·thea \ˌa-məl-ˈthē-ə\

Definition of Amalthea

astronomy

  1. :  the largest of the inner satellites of Jupiter with a diameter of approximately 100 miles (160 km) The moon is only 40 to 50 miles in diameter and, like the one found earlier, is far closer to Jupiter than the planet's larger moons. Its orbit, however, lies 25,000 miles farther out than that of Amalthea, innermost of the moons previously known. — New York Times, 23 May 1980

Love words? You must — there are over 200,000 words in our free online dictionary, but you are looking for one that’s only in the Merriam-Webster Unabridged Dictionary.

Join MWU now and get access to America’s largest dictionary, with:

  • 300,000 words that aren't in our free dictionary
  • Expanded definitions, etymologies, and usage notes
  • Advanced search features
  • Ad free!

Origin and Etymology of amalthea

borrowed from Latin Amalthēa, a nymph in classical myth who nursed Zeus, borrowed from Greek Amáltheia


First Known Use: 1960


Seen and Heard

What made you want to look up Amalthea? Please tell us where you read or heard it (including the quote, if possible).

WORD OF THE DAY

feeling or affected by lethargy

Get Word of the Day daily email!