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LEO

abbr.

1. law enforcement officer

2. low earth orbit

Le·o

(lēō)

1. A constellation in the Northern Hemisphere near Cancer and Virgo, containing the bright stars Regulus and Denebola.

a. The fifth sign of the zodiac in astrology.

b. One who is born under this sign. In all senses also called Lion.

[Latin Leō, from leō, lion; see LION.]

Indo-European & Semitic Roots Appendices

Thousands of entries in the dictionary include etymologies that trace their origins back to reconstructed proto-languages. You can obtain more information about these forms in our online appendices:

Indo-European Roots

Semitic Roots

The Indo-European appendix covers nearly half of the Indo-European roots that have left their mark on English words. A more complete treatment of Indo-European roots and the English words derived from them is available in our Dictionary of Indo-European Roots.

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