'Studiousness' definitions:

Definition of 'studiousness'

noun

Diligent study

From: GCIDE

Studious \Stu"di*ous\, a. [L. studious: cf. F. studieux. See Study.]
1. Given to study; devoted to the acquisition of knowledge from books; as, a studious scholar. [1913 Webster]
2. Given to thought, or to the examination of subjects by contemplation; contemplative. --Locke. [1913 Webster]
3. Earnest in endeavors; aiming sedulously; attentive; observant; diligent; -- usually followed by an infinitive or by of; as, be studious to please; studious to find new friends and allies. [1913 Webster]
You that are so studious Of my affairs, wholly neglect your own. --Massinger. [1913 Webster]
4. Planned with study; deliberate; studied. [1913 Webster]
For the frigid villainy of studious lewdness, . . . with apology can be invented? --Rambler. [1913 Webster]
5. Favorable to study; suitable for thought and contemplation; as, the studious shade. [Poetic] [1913 Webster]
But let my due feet never fail To walk the studious cloister's pale. --Milton. [1913 Webster] -- {Stu"di*ous*ly}, adv. -- {Stu"di*ous*ness}, n. [1913 Webster]