We found 8 dictionaries that define the word geologic time scale:

General (2 matching dictionaries)

1. geologic time scale: Wiktionary
2. Geologic Time Scale, Geologic time scale: Wikipedia, the Free Encyclopedia

Art (1 matching dictionary)

3. ODLIS: Online Dictionary of Library and Information Science (No longer online)

Computing (1 matching dictionary)

4. geologic time scale: Encyclopedia

Science (3 matching dictionaries)

5. Earthquake Image Glossary (No longer online)
6. Illustrated Glossary of Geologic Terms (No longer online)
7. Atmospheric Chemistry and Air Quality (No longer online)

Tech (1 matching dictionary)

8. Schlumberger Oilfield Glossary (No longer online)

Definitions from Wiktionary (geologic time scale) ▸ noun:  A chronological scale of the earth's history used to measure the relative or absolute age of any part of geologic time. Similar: geological timescale, geologic timescale, geologic time, stage, geologic era, deep time, geochronology, epoch, geochronometer, astrochronology, more... Opposite: humtime scale Types: Precambrian, Paleozoic, Mesozoic, Cenozoic, more... ▸ Words similar to geologic time scale ▸ Usage examples for geologic time scale ▸ Idioms related to geologic time scale ▸ Wikipedia articles (New!) ▸ Words that often appear near geologic time scale ▸ Rhymes of geologic time scale ▸ Invented words related to geologic time scale