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.
Basal cell carcinoma. Basal cell carcinoma is also known as BCC, rodent ulcer and basalioma. It is a form of keratinocytic or non-melanoma skin cancer. Basal cell carcinoma is the most common type of cancer in humans and is particularly prevalent in the Australia and New Zealand.