Meaning

2 senses
  1. Essential components of a device, reaction, etc.

  2. A radioactive material

Origin

From active + material.

From active + material.

Wiktionary, CC BY-SA 4.0 · source

Forms

plural: active materials
Singularactive material
Pluralactive materials

regular

See also

neighbours in the dictionary
active material — meaning, examples, forms, synonyms | Krumeto