Source etymology 2
Original entry ↗A former unit of volumic radioactivity: the quantity of radon (ignoring its daughters) per litre of air which ionizes a sustained current of 0.001 esu.
From German Mache, surname of Heinrich Mache.
Relationships mentioned by the source
These are extracted mentions, not a timeline or a verified sequence of immediate parents.
- Borrowed-form mentionMachede
Inspect preserved source fields
Raw extraction fields are retained for auditing. Their order does not establish ancestry.
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