This word is not acceptable for play in the US & UK dictionaries that are being used in the following games:

• Lexulous
• Wordscraper
• Wordosaur

n. A three-dimensional printing process that makes a solid object from a computer image by using a computer-controlled laser to draw the shape of the object onto the surface of liquid plastic.

n. a means of rapid prototyping in which a laser hardens successive layers of a photopolymer to create a part with a shape defined by a computer model.

"To make each building, they went to firms that use the three-dimensional printing process called stereolithography, used to make design prototypes of various products like plastic containers for food, cleaning or pharmaceutical products."

SL    STL