What you the plural of scissor?

Scissor is a verb meaning to cut with scissors; to move in a way resembling the action of scissors. It has no plural form

The noun is scissors. Scissors is both the plural and singular form. The noun scissors belongs to a group of nouns that are words for things that require two parts to make the whole. The noun scissors is a shortened for for a 'pair of scissors'. The plural form is 'pairs of scissors.