Definition - What does Stereolithography (STL) mean?
Stereolithography is also known as optical fabrication, photo solidification, solid free form solidification and solid imaging.
Techopedia explains Stereolithography (STL)
SLA primarily enables the quick construction of smaller 3-D models and prototypes, where small parts can be created within hours. SLA, like any other additive manufacturing process, creates a model in a layered approach. It uses liquid plastic or curable photopolymer to serve as the material for each layer. The ultraviolet laser draws the object onto the liquid surface layer by layer until all layers are completed. When a layer is finished, it is exposed to ultraviolet laser light that solidifies the layer and allows it to merge with the previous layer.