Definition

Noun: - A geological time period: The "age of fishes" refers to a specific interval in Earth's history, from approximately 405 million to 345 million years ago. It is characterized by the dominance of fish in aquatic environments and the first appearance of amphibians and ammonites.

Usage

• This term is used in scientific and educational contexts, particularly in geology and paleontology, to describe this specific prehistoric era.
• It is often capitalized as the "Age of Fishes" when referring to it as a formal geological period.

Examples

Advanced Usage

• The "age of fishes" is commonly synonymous with the Devonian Period within the Paleozoic Era.
• In a broader metaphorical sense, it can be used to describe any era or situation dominated by a particular group or type. (e.g., ) This usage is figurative and less common.

Variants and Related Words

• Devonian Period: The formal geological name for this time interval.
• Paleozoic Era: The larger geological era that contains the Devonian Period.

Synonyms

• Devonian Period (primary synonym)
• The Age of Fish (a less common variant)

Notes on Meaning

This term has a single, specific scientific meaning related to geological time. Its core definition is not idiomatic. The potential figurative use mentioned in "Advanced Usage" is an extension of its literal meaning and is not standard in academic texts.

Noun

1. from 405 million to 345 million years ago; preponderance of fishes and appearance of amphibians and ammonites