forming an adjunct / additional; neither basic nor primary / (logic) the property of two operations x and y, such that ax(ayb) = a, and ay(axb) = a

(banking) A plastic card, usually with a magnetic strip or an embedded microchip, connected to a credit account and used to buy goods or services. / (informal) Any type of bank card.

Any cystatin found in plants.

overscrupulousness