(Greek: prefix; no, absence of, without, lack of; not)
These prefixes are normally used with elements of Greek origin, a- is used before consonants and an- is used before vowels.
It affects the meanings of hundreds of words.
There are too many words that use these prefix elements to list all of them on this site; however, there are significant examples listed in this and the other units where they exist.
2. Progressive loss of vitality of certain tissues or organs leading to disorders or losses of functions: The abiotrophy of the heart may be appreciably shorter than that of other organs of the body which can lead to early disturbances in activities that upset other bodily organs.
2. Blindness, unable to see: Because Dan's mother experienced ablepsia, she is using a white cane to help her get around safely in the community.
The acephalobrachia and the abrachiocephalia consist of humans that are missing heads and upper arms during fetal development and then at birth.
2. Anything too deep for measurement: The well in the garden was an abysm because Daryl was unable to determine how deep it was.
3. An immeasurably profound depth or void; a bottomless pit: Verna's heart felt like an abysm of sadness after her boyfriend left her for another relationship.
2. Incapable of being measured or even understood; incomprehensible, inscrutable: Kristy felt like an abysmal failure because she couldn't remember how to spell the key word in the spelling contest.
3. Etymology: from the year 1656, formed in English from obsolete abysm, "bottomless gulf, greatest depths"; from Old French abisme, from Vulgar Latin abyssimus.
Go to this Word A Day Revisited Index
so you can see more of Mickey Bach's cartoons.
2. Anything too deep or too great to be measured; lowest depth: Melody's heart felt like an abyss of despair after she received the e-mail.
3. An immeasurably deep chasm, depth, or void: The canyon was described as an abyss because it was almost impossible to see its bottom.
4. The primeval chaos out of which it was believed that the earth and sky were formed: The film portrayed the abyss out of which the formation of the earth and solar system is supposed to have taken place.
5. The abode of evil spirits; hell, thought of as a bottomless pit: Hugh's anguished soul descended into the abyss of hell.
Strictly speaking, the abyss is a particular zone extending between 3,000 and 6,000 meters (9,840 and 19,680 feet at 3.28 feet per meter) in depth. By extension, the abyss is also used to designate the deep oceans everywhere.
2. In oceanography, of or relating to the deepest regions of the ocean and the organisms inhabiting that environment; at depths between 4,000 and 6,000 meters (13,123 feet and 19,685 feet): In order to explore the abyssal regions of the ocean, specialized underwater robots were used.
2. Living on or in the ocean floor in the great depths of the oceans or lakes into which light does not penetrate; commonly used in oceanography of depths between 4,000 and 6,000 meters (13,123 and 19,685 feet): The fish that was discovered recently was an example of an abyssobenthonic creature.
The term abyssolith is part of the vocabulary used in the science of petrology.