Dictionary:

noetic

  (nō-ĕt'ĭk)

Of, relating to, originating in, or apprehended by the intellect.

[Greek noētikos, from noēsis, understanding. See noesis.]

(Greek, intellectual, of the mind) Of or pertaining to the mind or intellect; characterized by intellectual activity. ‘Noetic rays’ are sometimes cited disparagingly as the mysterious connections between minds and facts, that enable us to refer to them and know about them. See also hylē, noema.

Term used by scientific writer Charles A. Musès and others to denote the science of consciousness and its alterations. He noted in 1977, "Noetics is concerned with the nature, alterations and potentials of consciousness, and especially human consciousness." (This parapsychological use of "noetic" is, of course, distinct from its prior use as a synonym for "noachian," meaning pertaining to Noah and his period.)

An earlier use of the word noetic in relation to states of consciousness was in the article "Psychic and Noetic Action" by Theosophist Helena Petrovna Blavatsky (1831-1891), originally published in the journal Lucifer (October-December 1890) during the last years of her life. In this article, Blavatsky equated noetic with manasic (deriving from manas, a Sanskrit term for mind) and compared materialistic psychological views of her time with ancient Hindu religious teachings and occultism. She concluded that there is a higher noetic character of the mind principle than individual ego, a "spiritualdynamical" force relating to divine consciousness, as distinct from mechanistic psychological dogmas or passive psychicism. This interesting article was reprinted in volume 3 of Studies in Occultism, a series of reprinted articles by Blavatsky.

Musès's use of noetics has been picked up by Edgar D. Mitchell for his psychical research organization, the Institute of Noetic Sciences.

Sources:

Blavatsky, Helena P. "Psychic and Noetic Action." In Studies in Occultism. Boston: New England Theosophical Corporation, 1895.

Musès, Charles A. "The Politics of Psi: Acculturation and Hypnosis." In Extrasensory Ecology, edited by Joseph K. Long. Metuchen, N.J.: Scarecrow Press, 1977.

The adjective has one meaning:

Meaning #1: of or associated with or requiring the use of the mind
  Synonyms: intellectual, rational