This word is acceptable for play in the US & UK dictionaries that are being used in the following games:

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n. The process of chewing.

n. The process of crushing as though chewed.

n. The act or operation of masticating; chewing, as of food.

n. The act of chewing; the process of triturating food with the teeth; manducation.

n. The process of tearing to pieces or kneading, as india-rubber, by means of the masticator.

n. biting and grinding food in your mouth so it becomes soft enough to swallow

"In this class too must be reckoned the teeth, which in some animals have but a single function, namely the mastication of the food, while in others they have an additional office, namely to serve as weapons; as is the case with all animals that have sharp interfitting teeth or that have tusks."

change of state   

muscles of mastication   

rumination    chomping    gumming    mumbling   

ingurgitation    going-over    rubdown    sollicitation    sanguification