不行光合作用的單細胞有機體，它們具所有生存所需之微小細胞器與化學物質，亦具可用於移動之構造，例如纖毛、鞭毛或外骨骼；它們能獨立生存或形成集群。過去被歸類於動物界中。雖然原生生物構成一亞界，但彼此間未必具有關連，因為它們不是一個自然構成的集群，只是一群被囊括在同一類別的有機體。原生生物亞界包含的生物超過六萬五千種，其中超過半數為化石種。

原生生物亞界(亞界)　(P,,U,繁體中文-偏好,D,U,U)
yüan sheng sheng wu ya(P,,U,韋氏拼音-偏好,UF,U,U)
yuán shēng shēng wù yǎ(P,,U,漢語拼音-偏好,UF,U,U)
yuan sheng sheng wu ya(P,,U,漢語拼音(無聲調)-偏好,UF,U,U)
Protozoa(subkingdom)　(P,,U,英文-偏好,D,U,N)
Protozoa(subkingdom)　(P,,U,拉丁語-偏好,D,U,N)
protozoans(,U,英文-非偏好,AD,U,N)
protozoan(,U,英文-非偏好,AD,U,N)
protozoons(,U,英文-非偏好,UF,U,N)

藝術與建築詞典根目錄
....代理者層面
........活體有機體
............真核生物 (域)
................原生生物界 (界)
....................原生生物亞界 (亞界)

distinguished from....

微生物

英文....

Subkingdom of single-celled, non-photosynthetic organisms containing all the minute organelles and chemicals needed to live, with locomotary structures such as cilia or flagella, and sometimes an exoskeleton; they exist singly or gathered into colonies. They were formerly classified in the animal kingdom. Although they comprise a subkingdom, protozoans are not necessarily related to one another, as they are not a natural group, but simply a collection of organisms. There are more than 65,000 described species, of which over half are fossil.

原生生物亞界(亞界)............	[AS-Academia Sinica]
.................	大英百科全書線上繁體中文版 December 21, 2012
Protozoa(subkingdom)............	[VP]
.................	Encyclopedia Americana (1985) illustration, 863, ill. 862
.................	Grzimek's Animal Life Encyclopedia (1972-1975) Vol. 1, 89
.................	CDMARC Subjects: LCSH (1988-) BT invertebrates, Protists
.................	Judge and Toyne, Oxford Illustrated Encyclopedia (1985) Vol. 2, 270
.................	Thesaurus of Park, Recreation, and Leisure Service Terms (1990)
.................	Webster's Third New International Dictionary (1961)
.................	Random House Unabridged Dictionary (1993)
.................	Encyclopedia Britannica Online (2002-) "Protozoan," accessed 11 May 2006
protozoans............	[VP]
.................	Collier's Encyclopedia (1950) illustration, 2:232, image at p. 231
.................	Oxford English Dictionary (1989)
.................	Judge and Toyne, Oxford Illustrated Encyclopedia (1985) 2:270, Used throughout entry.
.................	Webster's Third New International Dictionary (1961)
.................	Random House Unabridged Dictionary (1993)
.................	Encyclopedia Britannica Online (2002-) "Four-Kingdom Scheme of Classification," 15 February 2005
protozoan............	[VP]
.................	Getty Vocabulary Program rules
protozoons............	[VP]
.................	Encyclopedia Americana (1985) illustration, 863, ill. p.862; unicellular & motile; most animal-like Protista
.................	Webster's Third New International Dictionary (1961)
.................	Random House Unabridged Dictionary (1993)
Subject:............	[VP]
.................	Encyclopedia Britannica Online (2002-) "Protozoan," accessed 11 May 2006

Getty AAT: 300265682 Getty AAT: http://www.getty.edu/vow/AATFullDisplay?find=costume&logic=AND¬e=&subjectid=300265682
聯合目錄： 原生生物亞界 、yüan sheng sheng wu ya 、yuán shēng shēng wù yǎ 、yuan sheng sheng wu ya 、Protozoa 、protozoans 、protozoan 、protozoons 、Protozoa