Meaning & use
Mya
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Meaning
abbreviationtechnicalspecialist
A short way of writing 'million years ago,' used mainly in geology and paleontology to date events in the distant past.
Grammar: Always follows a number: '65 Mya' means 65 million years ago. It is not used for recent dates.
Patterns
- number + Mya
- number + Mya (ago)
Dinosaurs died out about 66 Mya.
The first humans appeared roughly 2.8 Mya.
This rock layer formed around 200 Mya.
Common combinations
- million years ago
- The abbreviation Mya stands for 'million years ago'.
- date something to X Mya
- Scientists dated the fossil to 3.2 Mya.
- X Mya extinction event
- The 66 Mya extinction event wiped out the dinosaurs.
- from X Mya
- These tools date from 1.5 Mya.
Synonyms and how they differ
- Ma
- Also means 'million years ago' but is more common in formal scientific writing; Mya is more explicit for general readers.
Commonly confused: Mya or mya?
Mya vs mya
Sometimes confused with the Burmese word 'mya' meaning 'emerald', but in English it is almost always the abbreviation for million years ago.
Practice
Which sentence uses 'Mya' correctly?
Choose one answer.
'Mya' is an abbreviation for 'million years ago' and follows a number. The other options misuse it as a word for time or quantity.
Make it your own
Write a sentence using “Mya”, then check it and compare it with the examples above.