(Greek: a suffix; pertaining to; of the nature of, like; in chemistry, it denotes a higher valence of the element than is expressed by -ous)

A reference to or characterized by acidosis.
Pertaining to bacteria that tolerate an acid environment which is usually fatal to non-sporulating bacteria.
Referring to an acinus.
aclastic (adjective)
1. Relating to or exhibiting aclasis.
2. Not refracting light rays; non-refractive.
acmesthetic (adjective), more acmesthetic; most acmesthetic
Relating to a sensation of sharp points touching the skin but lacking the perception of pain usually associated with such stimulation: Glenda had an acmesthetic feeling when the point of the needle was put into her arm; so, she didn't feel any pain.

Man is an intelligence in servitude to his organs.

-Aldous Huxley
acosmic (adjective), more acosmic, most acosmic
Conveying a denial of the existence of the universe as distinct from God: According to this viewpoint, the phenomenal dualistic acosmic world is ultimately an illusion, regardless of the apparent reality it possesses at the mundane or empirical level.
acousmatic (adjective), more acousmatic, most acousmatic
1. Relating to a class of scholars under Pythagoras, who listened to his teachings, without inquiring into their inner truths: The acousmatic pupils of the philosopher Pythagoras, were required to sit in total silence while they listened to him deliver his lecture from behind a veil or screen, so they might be able to concentrate better on what he was teaching them.
2. A reference to a sound, whether natural or produced, when the source of the sound is unseen or has no visually recognizable cause: In a mystery film, the prisoner could hear the acousmatic ringing of a bell from a source far above him.
acoustic (adjective) (not comparable)
1. Pertaining to the sense of hearing: Dogs are known to have a much greater acoustic range for hearing than humans.
2. A reference to something that can be used to aid a person's hearing: The doctor prescribed an acoustic hearing aid for Mark so he could listen to others better.
Pertaining to the sense of hearing.
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acoustic agraphia (s) (noun), acoustic agraphias (pl)
The inability to write from dictation or from what is heard: Dr. Davis is a specialist in treating acoustic agraphias with which several of his patients are afflicted.
acoustic aphasia (s) (noun), acoustic aphasias (pl)
Impairment in the understanding of auditory language and communication, including the inability to write from dictation in the presence of normal hearing: Acoustic aphasia consists of sounds that are heard but which convey no meaning; however, spontaneous speech, reading, and writing are supposedly not affected.
acoustic apparatus (s) (noun); acoustic apparatuses (pl)
The numerous body organs and structures consisting of hearing; especially, the various parts of the ear: As future ear, eye, nose and throat specialists, some of the medical students found the acoustic apparatus to be the most difficult to master.