Skilled, a.
Having familiar knowledge united with readiness and dexterity in its application; familiarly acquainted with; expert; skillful; -- often followed by in; as, a person skilled in drawing or geometry.
Shades of meaning
Fernald has no entry of its own for skilled; he lists it under skilful.
Where he writes about it:
Dexterity can not be communicated, and, oftentimes can not even be explained by its possessor; skill to a very great extent can be imparted; "skilled workmen" in various trades are numbered by thousands. — from dexterity
A skilled workman is one who has thoroughly learned his trade, though he may be naturally quite dull; a skilful workman has some natural brightness, ability, and power of adaptation, in addition to his acquired knowledge and dexterity. — from skilful