1) Consciousness study 2) Layer of the mind 3) Unconscious 1) Unconscious 
In psychology, the subconscious is the part of consciousness that is not currently in focal awareness. The word subconscious is an anglicized version of the French subconscient as coined by the psychologist Pierre Janet, who argued that underneath the layers of critical thought functions of the conscious mind lay a powerful awareness that he calle...
• (a.) Occurring without the possibility or the fact of an attendant consciousness; -- said of states of the soul. • (a.) Partially conscious; feebly conscious.
(sәb-kon´shәs) imperfectly or partially conscious. a term formerly used to include the preconscious and unconscious.
Sub·con'scious adjective 1. Occurring without the possibility or the fact of an attendant consciousness; -- said of states of the soul. 2. Partially conscious; feebly conscious. 
Type: Term Pronunciation: sŭb-kon′shŭs Definitions: 1. Not wholly conscious. 2. Denoting an idea or impression that is present in the mind, but of which there is at the time no conscious knowledge or realization. 3. That part of the mind that is outside conscious awareness.
[adj] - just below the level of consciousness
subconscious 1. In psychology, partially or imperfectly conscious; belonging to a class of phenomena resembling those of consciousness but not clearly perceived or recognized. 2. Pertaining to the subconscious; belonging to that portion of the mental field the processes of which are outside the range of attention. 3. The part of the mind that is ...
adjective just below the level of consciousness
existing or operating in the mind beneath or beyond consciousness:Cf. the subconscious self. · imperfectly or not wholly conscious: subconscious motivations.
just below the level of awareness