Akaryocytes, also known as akaryotes or acaryotes, are cells without a nucleus. The most common type of akaryocytes are viruses. The name is derived from the Greek prefix "a-", meaning "without" and the Greek "karyo-", meaning "nut" or "kernel". Akaryocytes also include viruses since they lack a nucleus and cytoplasm but have instead, a central core of RNA or DNA. Akaryocytes are not part of the seven main ranks of taxa. Red blood cells are also classified as akaryocytes because they lack a cell nucleus after they have developed.
Akaryote is not used for a group of organisms in the way that prokaryotes and eukaryotes are used. The word akaryote is not a common word, but when used it is a synonym for akaryocyte meaning "a cell that does not have a nucleus" and is used in the context of eukaryotes, in which cells normally do have a nucleus. (It is not used in the context of a prokaryote, which does not have a nucleus but does have a cell, or in the context of a virus, which does not even have a cell.) 041b061a72