Ptolemy
Definition
- Proper noun:
- A member of an ancient Macedonian dynasty that ruled Egypt: Refers to any of the kings in the Ptolemaic dynasty, which governed Egypt from the death of Alexander the Great (323 BC) until the Roman conquest (30 BC).
- A famous astronomer from Alexandria: Refers specifically to Claudius Ptolemaeus, a 2nd-century AD scholar whose astronomical and geographical theories were authoritative for centuries.
Usage Examples
Proper noun (Dynasty):
- Ptolemy I Soter was a general under Alexander the Great.
- The last ruler of the Ptolemaic line was Cleopatra VII.
Proper noun (Astronomer):
- Ptolemy's geocentric model placed the Earth at the center of the universe.
- In his work the *Almagest, Ptolemy cataloged stars and planetary motions.*
Advanced Usage
- "Ptolemaic" (adj): Pertaining to the dynasty or the astronomical system.
- The Ptolemaic Kingdom was a center of Hellenistic culture.
- The Ptolemaic system was complex, using epicycles to explain planetary movement.
Variants and Related Words
- Ptolemaic (adjective): Of or relating to the Ptolemies of Egypt or the astronomical theories of Ptolemy.
- Ptolemaist (noun, historical): A supporter of the Ptolemaic system of astronomy.
Synonyms
- For the dynasty: Ptolemaic king, Hellenistic ruler of Egypt.
- For the astronomer: Claudius Ptolemaeus (full name), the Alexandrian astronomer.
Notes on Different Meanings
- The two primary references are distinct: one is a historical line of rulers, and the other is a specific historical figure known for scholarship. Context clarifies which is intended. The astronomer is often referred to with his work, e.g., "Ptolemy's ."
Noun
-
an ancient dynasty of Macedonian kings who ruled Egypt from 323 BC to 30 BC; founded by Ptolemy I and ended with Cleopatra
-
Alexandrian astronomer (of the 2nd century) who proposed a geocentric system of astronomy that was undisputed until the late Renaissance
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