IPA: /ˌmɛtəˈsteɪbli/
KK: /mɛtəˈstæbli/
In a state that is stable but not in the lowest energy state, often used in scientific contexts.
The system can exist metastably for a long time before transitioning to a more stable state.
Metastably is formed from "meta-" (meaning beyond or change) and "stabilis" (from Latin, meaning stable). The word describes a state that is stable under certain conditions but can change under different circumstances.
Think of 'meta-' meaning beyond or change, and 'stabilis' meaning stable — this helps you remember that metastably refers to a state that is stable but can change.