Claudius Ptolemaeus

1 9.9

An astronomer and mathematician from Alexandria in the 2nd century who said that Earth is the center of the universe

proper noun
/ˈklɔːdiəs ˌtoʊləˈmeɪəs/

: Claudio Ptolomeo

Claudius Ptolemaeus developed a geocentric model that dominated astronomy for over a thousand years.

Examples

The theories of Claudius Ptolemaeus were eventually replaced by the heliocentric model.
Many early maps were influenced by the works of Claudius Ptolemaeus.
Wow! Claudius Ptolemaeus changed our understanding of the cosmos!
The theories of Claudius Ptolemaeus shaped medieval astronomy.
Claudius Ptolemaeus developed a geocentric model that dominated astronomy for over a thousand years.
The theories of Claudius Ptolemaeus were eventually replaced by the heliocentric model.
Many early maps were influenced by the works of Claudius Ptolemaeus.

Surface Forms

Claudius Ptolemaeus main

Morphology

Claudius + Ptolemaeus

This is a full proper name referring to a specific historical person rather than a compositional phrase; knowing the constituents ('Claudius' and 'Ptolemaeus') does not let a B1 learner infer the specialised meaning (Alexandrian astronomer/mathematician). One constituent ('Claudius') might suggest a Roman name and the other is opaque or unknown, so the phrase’s referential information is not derivable from the parts.

Etymology

Claudius Ptolemaeus was a scholar in ancient Alexandria who made maps and a model that put the Earth at the center of the sky. People used his idea of the 'Earth at the center' for over a thousand years, so his name now reminds us of that old way of thinking about the universe.