Scrabble?! NUCLEATION

Definitions of NUCLEATION in various dictionaries:

Nucleation is the first step in the formation of either a new thermodynamic phase or a new structure via self-assembly or self-organization. Nucleation is typically defined to be the process that determines how long an observer has to wait before the new phase or self-organized structure appears. For example, if a volume of water is cooled (at atmospheric pressure) below 0° C, it will tend to freeze into ice. Volumes of water cooled only a few degrees below 0° C often stay completely ice free for long periods. At these conditions, nucleation of ice is either slow or does not occur at all. However, at lower temperatures ice crystals appear after little or no delay. At these conditions ice nucleation is fast. Nucleation is commonly how first-order phase transitions start, and then it is the start of the process of forming a new thermodynamic phase. By contrast new phases at continuous phase transitions start to form immediately. Nucleation is often found to be very sensitive to impuritie