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.
Carcinoma of the pancreas exhibiting exocrine differentiation and lacking significant (<25%) ductal or endocrine differentiation. Acinic cell carcinoma. (Note that solid-pseudopapillary neoplasm was erroneously considered in some early reports to be acinar and designated cystic acinar cell carcinoma)