The term 'seed integument' refers to the protective outer layer of a seed. The two crossword solutions for this term are 'testa' (5 letters) and 'ARIL' (4 letters). Testa is the Latin word for a hard outer covering, such as a seed coat or shell. An ARIL is a fleshy or waxy outgrowth from a seed that may be brightly colored and edible. Together, these two structures form the seed integument, which serves to protect the seed and aid in its dispersal.