The word "layman" refers to someone who doesn't have specialized knowledge or training in a particular field. They have a general understanding of things but are not experts in the subject. Full definition
For laymen interested in healthcare and providing support in the defining moments of a family's life, it might just be the perfect fit. (thefashionablehousewife.com)
They are required to translate numbers into plain English, as layman language goes. (coverlettersandresume.com)
Dietrich Ritschl suggests that the minister take part with a select group of laymen in the study of the scripture passage from which the sermon will be preached the following Sunday. (religion-online.org)