What is "antitranspirant"

a. (context botany horticulture English) Reducing transpiration in plants. n. (context botany horticulture English) A substance applied to plant leaf to reduce transpiration.

Antitranspirants are compounds applied to the leaves of plants to reduce transpiration. They are used on Christmas trees, on cut flowers, on newly transplanted shrubs, and in other applications to preserve and protect plants from drying out too quickly. They have also been used to protect leaves from salt burn and fungal diseases .

Antitranspirants are of two types: