The author was referring to the steam holiday gems. They are a new feature (released yesterday) in which a steam user can turn their extra junk cards/backgrounds/emotes into gems.. These gems can be used to buy more cards; or, during the upcoming holiday event only, to bid on games.
Acinar cells. 1  Acinar cells are the exocrine (exo=outward) cells of the pancreas that produce and transport enzymes that are passed into the duodenum where they assist in the digestion of food.
any of the cells lining an acinus, especially applied to the zymogen-secreting cells of the pancreatic acini. adherent cell. one that adheres to the glass or plastic container in cell cultures, to form the monolayer.