I'm not familiar with "meyd-425" as a standard term or code. It's possible this could be:

1. A specific product code or model number for a particular device or system

2. A reference to something internal within an organization

3. A typo or misspelling of another term

Without more context, it's difficult to provide accurate information about what "meyd-425" might refer to. Could you please provide more details about where you encountered this term or what field it might relate to? That would help me give you a more useful response.