Leo

one of several hundred known celestial objects, generally believed to be rapidly rotating neutron stars, that emit pulses of radiation such as radio waves with a high degree of regularity

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noun

Saint, died a.d. 683, Sicilian ecclesiastic: pope 682–683.

noun

Saint, a.d. c750–816, Italian ecclesiastic: pope 795–816.

(“the Isaurian” ), a.d. c680–741, Eastern Roman emperor 717–741.

noun

Saint, died a.d. 855, Italian ecclesiastic: pope 847–855.

noun

flourished 10th century a.d, Italian ecclesiastic: pope 903.

noun

pope a.d. 928.

noun

died a.d. 939, Italian ecclesiastic: pope 936–939.

noun

died a.d. 965, Italian ecclesiastic: pope 963–965.

noun

Saint (Bruno) 1002–54, German ecclesiastic: pope 1049–54.

noun

(Giovanni de'Medici) 1475–1521, Italian ecclesiastic: pope 1513–21 (son of Lorenzo de'Medici).

noun

(Alessandro de'Medici) 1535–1605, Italian ecclesiastic: pope 1605.

noun

(Annibale Francesco della Genga) 1760–1829, Italian ecclesiastic: pope 1823–29.

noun

(Giovanni Vincenzo Pecci) 1810–1903, Italian ecclesiastic: pope 1878–1903.

Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2013.
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Link To Leo

Collins

World English Dictionary

Leo¹ (ˈliːəʊ)

—n
	a name for a lion, used in children's tales, fables, etc

[from Latin: lion]

Leo² (ˈliːəʊ, liːˈəʊnɪən)

—n , Latin genitive Leonis
1.	astronomy a zodiacal constellation in the N hemisphere, lying between Cancer and Virgo on the ecliptic, that contains the star Regulus and the radiant of the Leonid meteor shower
2.	astrology
	a. Also called: the Lion the fifth sign of the zodiac, symbol ♌, having a fixed fire classification and ruled by the sun. The sun is in this sign between about July 23 and Aug 22
	b. a person born during a period when the sun is in this sign

—*adj*
3.	astrology born under or characteristic of Leo

LEO

—*abbreviation for*
	low earth orbit

Leo I (ˈliːəʊ)

—n
	Saint, known as Leo the Great. ?390--461 ad, pope (440--461). He extended the authority of the papacy in the West and persuaded Attila not to attack Rome (452). Feast day: Nov 10 or Feb 18

Leo III

—n
1.	called the Isaurian. ?675--741 ad, Byzantine emperor (717--41): he checked Arab expansionism and began the policy of iconoclasm, which divided the empire for the next century
2.	Saint. ?750--816 ad, pope (795--816). He crowned Charlemagne emperor of the Romans (800). Feast day: June 12

Leo IX

—n
	Saint, original name Bruno of Egisheim. 1002--54, pope (1049--54): first of the great medieval reforming popes. Conflict with the Eastern Church led to the schism between Rome and Constantinople (1054). Feast day: April 19

Leo X

—n
	original name Giovanni de' Medici. 1475--1521, pope (1513--21): noted for his patronage of Renaissance art and learning; excommunicated Luther (1521)

Leo XIII

—n
	original name Gioacchino Pecci. 1810--1903, pope (1878--1903). His many important encyclicals include Rerum novarum (1891) on the need for Roman Catholics to take action on various social problems

Collins English Dictionary - Complete & Unabridged 10th Edition
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Etymonline

Word Origin & History

Leo

zodiac constellation, O.E., from L. leo "lion" (see lion). Meaning "person born under the sign of Leo" is from 1894. Leonid "meteor which appears to radiate from Leo" is from 1876. The annual shower peaks Nov. 14.

American Heritage

Science Dictionary

Leo

(lē'ō) Pronunciation Key
A constellation in the Northern Hemisphere near Cancer and virgo. Leo (the Lion) contains the bright star Regulus and is the fifth sign of the zodiac.

FOLDOC

Computing Dictionary

LEO definition

Low Earth Orbit

Leo definition

1. A general-purpose systems language, syntactically like Pascal and Y, semantically like C.
["The Leo Programming Language", G. Townsend, CS TR 84-7, U Arizona 1984].
(1996-02-06)
2. A general data management environment which can show user-created relationships among any kind data. It can also be used as an outlining editor as it embeds the noweb and CWEB markup languages in an outline context.
Leo is written in pure Python using Tk/tcl and so runs on Windows, Linux and MacOS X. It isdistributed under the Python License.
(2006-07-12)

American Heritage

Abbreviations & Acronyms

LEO