tissue

tis·sue

noun
\ˈtish-(ˌ)ü, ˈtish-ə(-w), chiefly British ˈtis-(ˌ)yü\

Definition of TISSUE

: an aggregate of cells usually of a particular kind together with their intercellular substance that form one of the structural materials of a plant or an animal and that in animals include connective tissue, epithelium, muscle tissue, and nerve tissue