| AMM | an atomic clock based on vibrational frequency of the nitrogen atom in the ammonia molecule |
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| AMM | a water solution of ammonia |
| AMM | the aromatic gum of the ammoniac plant |
| AMM | pertaining to or containing or similar to ammonia |
| AMM | pertaining to or containing or similar to ammonia |
| AMM | treat with ammonia |
| AMM | combined or treated with ammonia |
| AMM | impregnation with ammonia or a compound of ammonia |
| AMM | treat with ammonia |
| AMM | one of the coiled chambered fossil shells of extinct mollusks |
| AMM | of or related to an order of fossil cephalopods |
| AMM | the ion NH4 derived from ammonia |