plasm

(archaic, countable, uncountable) Protoplasm.
(countable, uncountable) A mold or matrix in which anything is cast or formed to a particular shape.
(countable, uncountable) A membrane or cell layer, especially one in an embryo that later develops into a structure; the constituent cells of such a layer.

Pronounced as (IPA)

/ˈplæzəm/

From Late Latin plasma (“mold”) or Ancient Greek πλάσμα (plásma, “something formed”), in some cases via German Plasma or French plasme, like English plasma.