Definition of Phobos in English:

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Phobos

Pronunciation: /ˈfōbəs/ /ˈfōbäs/
Astronomy
The inner, and larger, of the two satellites of Mars, discovered in 1877. Heavily cratered and shaped like a potato, it is 17 miles (28 km) long. Compare with Deimos.

Origin

Named after one of the sons of the Greek war god Ares. The name means literally 'fear'.

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