a-, an- +

Absence of milk in the breasts after childbirth.

Nonsexual reproduction, as by fission, budding, etc.

Absence of the stomach.

Having no alimentary canal.

Lack of development or absence of an organ or other body part.

1. The absence of orientation movements in response to gravity.
2. Turning away from the earth.
3. A reference to parts of plants that would be expected to grow as gravity pulls them down, but instead grow upward; such as, the knee roots of cypress trees.

Absence or impairment of the sense of taste; it may be due to disorder in the gustatory apparatus (i.e. the taste buds).

It is also seen in psychiatric conditions, particularly in depressed patients who complain that food is tasteless.

1. Without a tongue; no tongue.
2. A congenital absence of the tongue.
3. The loss of the ability to speak; mutism.

A total absence of the lower jaw.

1. The inability to recognize certain sensory stimuli.
2. A loss of the ability to comprehend the meaning or to recognize the importance of various types of stimulation.
3. Total or partial loss of the ability to recognize familiar objects, often resulting from brain damage.
4. Loss of the ability to recognize persons or objects and their meanings.
5. In medicine, a loss of comprehension at the level of the central nervous system of any of the senses; the sensory sphere is intact, but the patient is unable to assimilate the meaning of the sense.

1. Not known, unknown; an assertion of the uncertainty of all claims to knowledge; coined by Thomas Huxley in 1870.
2. One who believes the existence of God is unknown, but does not deny the possibility that God exists.
3. Someone who thinks it is impossible to know whether there is a God, future life, or anything beyond material phenomena and who is unwilling to accept supernatural revelation.

Not forming an angle; no angle.

Ungrammatical speech; a form of aphasia, in which the patient forms words into a sentence without regard for grammatical rules of declension, conjugation, comparison of adjectives and adverbs, auxiliary verbs, prepositions, conjunctions, articles, etc.

1. A reference to a disorder marked by the inability to write.
2. A loss of the power, or the inability, to communicate (ideas) in writing, and thus a subdivision of aphasia.

The inability to identify numbers or letters traced on the palm (or other parts of the body surface).