gno-, gnos-, gnoto-, -gnostic, -gnosia, -gnomic, -gnomonic, -gnomical, -gnomy, -gnosia, -gnostic, -gnosis

(Greek: know, learn, discern)

abarognosis (s) (noun), abarognoses (pl)
A conscious loss of being able to appreciate the weight of objects held in the hand, or to differentiate objects of different weights: When Sarah went to the grocery store, she found that the abarognosis in her hands made it difficult for her to even estimate how heavy the pineapple she wanted to buy was.

Larry almost dropped the heavy vase that was in his hand because of his abarognosis.

The doctor was not able to determine the cause of Claude's abarognosis or why he couldn't feel the empty glass in his hand.

acognosia, acognosy (s) (noun); acognosias, acognosies (pl)
1. A knowledge of or the study of remedies or cures.
2. Etymology: from Greek ako(s), "remedy" + gnos(is), "knowledge" + ia, suffix for "noun".
ad ignorantiam (Latin phrase)
Translation: "To ignorance": The complete phrase is argumentum ad ignorantiam. Used in law, it is an argument in a trial that may be based on ad ignorantiam; that is, on an opponent's ignorance of the facts in a legal case.

Also, a judicial decision may be appealed ad ignorantiam; that is, on the basis that the case was decided without knowledge of important information which was known but was unrevealed during the trial.

agnogenic
Of unknown cause or spontaneous origin; of the nature of idiopathic or an idiopathy (a pathologic condition of unknown cause or spontaneous origin).
agnoiology (s) (noun)
1. The doctrine concerning those things of which we are necessarily ignorant.
2. The science or study of ignorance, which determines its quality and conditions.
agnosia (s) (noun), agnosias (pl)
1. The inability to recognize certain sensory stimuli: Because of an extensive neural damage as the result of the car accident, Paul's friend experienced aural agnosia.
2. Loss of the ability to recognize people or objects and their meanings: A tragic consequence of the industrial accident was the onset of agnosia making it impossible for some of the workers to continue working because they couldn't remember how to perform their jobs anymore.
3. In medicine, losses of comprehensions at the levels of central nervous systems of any of the senses: The sensory spheres of the agnosias may be intact, but Linda is unable to assimilate the meanings of whatever the senses indicate.
agnosic
1. The inability to recognize and interpret the meaning and significance of sensory information, whether visual, auditory, or tactile even though the ability to perceive and record the primary sensory modality is intact.
2. Unable to recognize familiar objects due to brain damage.
agnostic (s) (noun), agnostics (pl)
1. Not known or that which is unknown; an assertion of the uncertainty of all claims to knowledge: The word agnostic was invented, or coined, by T.H. Huxley, the eminent British biologist, in his Science and Christian Tradition, published in 1870, page 21; because he felt that the existence of God was a proposition that could not be proven scientifically. So an agnostic says, in effect, "There may be a God, but as for me, I do not know."
2. A person who believes that the existence of God is unknown, but does not deny the possibility that God exists: Sherman, who was an agnostic, was not convinced that there is a God; however, he also was open to considering any evidence that would prove that God is a reality.
3. Someone who thinks it is impossible to know whether there is a God, future life, or anything beyond the material phenomena we are experiencing and who is unwilling to accept supernatural revelation: One dictionary defines an agnostic as being someone who is not, as is often held, someone who doesn’t know whether there is a God, but a person who believes it is impossible to know or to prove anything about the existence of God.

An agnostic is someone who says he knows nothing about God, and when you agree with him, he becomes angry.

—Evan Esar

An agnostic is someone who has no invisible means of support.

—John Buchan
agnosticism
1. The disbelief in any claims of ultimate knowledge.
2. The doctrine that certainty about first principles or absolute truth is unattainable and that only perceptual phenomena are objects of exact knowledge.
3. A religious orientation of doubt; a denial of ultimate knowledge of the existence of God: "Agnosticism holds that you can neither prove nor disprove God's existence."
anosognosia
1. The apparent unawareness of or failure to recognize one's own functional defect (e.g., hemiplegia, hemianopsia).
2. The lack of interest or belief in the existence of one's disease.
3. Real or feigned ignorance of the presence of disease, especially of paralysis.
argumentum ad ignorantiam
An argument based on an adversary's ignorance of facts in a controversy.
astereognosis
1. The inability to determine the form of an object by touch.
2. Loss of the ability to recognize the shapes of objects by handling them; tactile agnosia.
3. The inability to recognize familiar objects by touch that cannot be explained by a defect of elementary tactile sensation.
astrognosy
The science or knowledge of the stars; especially, the fixed stars.
atopognosia
1. The inability to correctly locate a point or place of a touch.
2. The inability to discern the origin of a sensation.
atopognosis
1. The inability to discern the origin of a sensation.
2. Absence or loss of topognosia; inability to locate correctly a point of touch.
3. Sensory inattention; inability to locate a sensation properly.

Usually caused by a contralateral parietal lobe lesion.

Inter-related cross references, directly or indirectly, involving word units meaning "know, knowledge; learn, learning": cogni-; discip-; histor-; intellect-; learn, know; math-; sap-; sci-; sopho-.