| Term: | Accretion |
| Definition: | Growth of a cloud or precipitation particle by the collision and union of a frozen particle (ice crystal or snowflake) with a supercooled liquid droplet which freezes on impact. |
| Term: | Accretion |
| Definition: | (1) Growth of a cloud or precipitation particle by collision with supercooled liquid droplets that freeze wholly or partially on impact. (2) The process by which a layer of ice or snow builds on solid objects such as overhead lines that are exposed to precipitation icing events. |