Amoeboid

The amoeboids comprise the protists that form pseudopods, temporary cytoplasmic projections that are involved in locomotion and ingesting food. Originally they were grouped together as the Sarcodina, but the different sorts of amoeboid forms have each evolved a number of times. These come in four main groups: those with lobose, filose, and reticulose pseudopods, which are unsupported, and those with axopods, which are rigid projections around microtubules.

Lobose pseudopods are blunt and filose pseudopods are tapering, occasionally branching, but both arise from the same sort of underlying pressure system. The best-known genus is Amoeba, and the name amoeba is often applied to all such forms, less often to amoeboids in general. In these, the outer cytoplasm forms a distinct layer called the ectoplasm, which is generally clear in contrast to the inner cytoplasm or endoplasm, which is generally granular. The main groups of such protists are:

Ramicristates - most lobose and filose forms, including most slime mold groups

Pelobionts - giant amoebae & kin

Entamoebae - mostly parasitic forms, including those which cause amoebic dysentery

Heterolobosea - amoeboflagellates, including acrasid slime molds

Vampyrellids

Nucleariids

Chlorarachniophytes

Lobose and filose pseudopods also occur in numerous other groups, including some cells in multicellular organisms. In particular, leukocytes (white blood cells) are essentially lobose amoebae in form. Several different sorts of movement are found among amoebae. Most form one or more pseudopods along the anterior margin, and move by the body mass flowing into them. Some roll, the ectoplasm sliding around them like a tank tread, or crawl, using relatively permanent pseudopods to support the cell like limbs.

Reticulose pseudopods are cytoplasmic strands that branch and merge to form a net. They are found most notably among the Granuloreticulosa, which includes primarily the Foraminifera - marine amoeboids with multichambered shells. Other forms include the Gymnophrea, Komokiacea, and Biomyxa.

Protists with axopods are traditionally divided into the radiolaria and heliozoa. The radiolaria are primarily marine with intricate mineral skeletons, including a central capsule separating the endoplasm from the vacuolated ectoplasm. There are three groups: the Phaeodarea, the Polycystinea, and the Acantharea. Along with the Foraminifera, these are the primary protozoa found in the fossil record. The heliozoa lack central capsules, though they may have scales or spines. There are a number of separate lineages:

Actinodines - including ciliophryids and actinophryids

Centrohelids

Desmothoracids

Gymnosphaerids

Dimorphids

Sticholonche

There is also a strange group of giant marine protists, the Xenophyophorea, that are clearly amoeboid but do not fit nicely into any of these categories.

Photo Album: Amoeboid

Thumbnail	Description & Credit	Thumbnail	Description & Credit
	The maximum size of red blood cells infected with Plasmodium vivax ranges between 1.5 - 2 times their normal size. A mature schizont is large and amoeboid in shape. Note the numerous chromatin masses, along with Schuffner's dots.Credit: CDC.		White blood corpuscles, exhibiting amoeboid movements in the external coat of a small vein - from the inflamed stomach of a mare.Credit: Library of Congress.
Source: compiled by the editor from various references; see credits.

Expressions: Amoeboid

Modern Translations: Amoeboid

Language		Translations for "amoeboid"; alternative meanings/domain in parentheses.
Danish		vandreceller (amoeboid cells). (various references)

French		cellules migratrices (amoeboid cells). (various references)

German		Wanderzellen (amoeboid cells). (various references)

Greek		αμοιβαδοειδής. (various references)

Italian		cellule migranti (amoeboid cells). (various references)

Pig Latin		amoeboiday

Russian		амебоид. (various references)
Source: compiled by the editor from various translation references.

Misspellings: Amoeboid

Anagrams: Amoeboid

Scrabble® Enable2K-Verified Anagrams
	Words within the letters "a-b-d-e-i-m-o-o"
	-1 letter: ameboid.
	-2 letters: boomed.
	-3 letters: abide, abode, adobe, adobo, aimed, amide, amido, bedim, biome, booed, demob, dobie, imbed, media, mooed.
	-4 letters: abed, aide, ambo, amid, amie, bade, bead, beam, bema, bide, bima, bode, boom, dame, demo, dime, dome, doom, iamb, idea, idem, mabe, made, maid, mead, mode, modi, mood, obia, oboe, odea.
	-5 letters: abo, ado, aid.
	Words containing the letters "a-b-d-e-i-m-o-o"
	+3 letters: automobiled.
Source: compiled by the editor from various references; see credits. SCRABBLE® is a registered trademark. All intellectual property rights in and to the game are owned in the U.S.A and Canada by Hasbro Inc., and throughout the rest of the world by J.W. Spear & Sons Limited of Maidenhead, Berkshire, England, a subsidiary of Mattel Inc. Mattel and Spear are not affiliated with Hasbro.

Alternative Orthography: Amoeboid

Hexadecimal (or equivalents, 770AD-1900s) (references)

41 6D 6F 65 62 6F 69 64

Leonardo da Vinci (1452-1519; backwards) (references)

American Sign Language (origins from 1620-1817 in Italy and, especially, France) (references)

⁼

Semaphore (1791, in France) (references)

Braille (1829, in France) (references)

Morse Code (1836) (references)

.- -- --- . -... --- .. -..

Dancing Men (Sir Arthur Conan Doyle, 1903) (references)

Binary Code (1918-1938, probably earlier) (references)

01000001 01101101 01101111 01100101 01100010 01101111 01101001 01100100

HTML Code (1990) (references)

&#65 &#109 &#111 &#101 &#98 &#111 &#105 &#100

ISO 10646 (1991-1993) (references)

0041 006D 006F 0065 0062 006F 0069 0064

British Sign Language (Fingerspelling, BSL; 1992, British Deaf Association Dictionary of British Sign Language) (references)

Encryption (beginner's substitution cypher): (references)

Domain	Definitions
Health	Cells capable of active migration by the throwing out and retraction of pseudopodia. (references)
Source: compiled by the editor from various references; see credits.

Amoeboid

Definition: Amoeboid

Amoeboid

Adjective

Specialty Definitions: Amoeboid

Health

Specialty Definition: Amoeboid

Synonym: Amoeboid

Crosswords: Amoeboid

Photo Album: Amoeboid

Expressions: Amoeboid

Modern Translations: Amoeboid

Danish

French

German

Greek

Italian

Pig Latin

Russian

Misspellings: Amoeboid

Misspellings

Anagrams: Amoeboid

Scrabble® Enable2K-Verified Anagrams

Alternative Orthography: Amoeboid

41 6D 6F 65 62 6F 69 64

.- -- --- . -... --- .. -..

01000001 01101101 01101111 01100101 01100010 01101111 01101001 01100100

&#65 &#109 &#111 &#101 &#98 &#111 &#105 &#100

0041 006D 006F 0065 0062 006F 0069 0064

3579817168817570

INDEX

Expressions using "amoeboid": amoeboid cells ♦ Amoeboid movement. Additional references.
Source: compiled by the editor from various references; see credits.

Misspellings
	"Amoeboid" is suggested in spellcheckers for the following: Amienois, samreboi. (additional references)
Source: compiled by the editor, based on several corpora (additional references).