為具外甲的海生或陸生爬蟲類。外殼通常包含上部(殼甲)與下部(腹甲)，由肋骨衍生而成，殼甲與腹甲在身體兩側結合，形成一個堅固的箱型骨骼架構。牠們的頭骨上無松果體孔，且顎不具齒。最早的龜鱉類生物十分古老，可追溯至兩億一千五百萬年前的上三疊紀時期，包含約三百種現存的龜、水龜及陸龜。某些龜類雖在水中或近水之處生存，卻無法在水中呼吸或產卵。

龜鱉目 (目)　(P,,U,繁體中文-偏好,D,,)
kuei pieh mu (P,,U,韋氏拼音-偏好,UF,U,U)
guī biē mù (P,,U,漢語拼音-偏好,UF,U,U)
gui bie mu (P,,U,漢語拼音(無聲調)-偏好,UF,U,U)
Testudines(order)　(P,,U,英文-偏好,D,L,N)
Testudines(order)　(P,,U,拉丁語-偏好,D,U,N)
turtles(,U,英文-非偏好,AD,U,N)
turtle(,U,英文-非偏好,AD,U,N)
Chelonia(,U,英文-非偏好,UF,U,N)
Chelonia(,U,拉丁語-非偏好,UF,U,N)
chelonians(,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)
................動物界 (界)
....................脊索動物門 (門)
........................脊椎動物亞門 (亞門)
............................爬蟲動物綱 (綱)
................................無弓亞綱 (亞綱)
....................................龜鱉目 (目)

source plant or animal for....

龜甲

英文....

Members of the order of armored marine or terrestrial reptiles usually having a shell comprising a top (carapace) and a bottom (plastron) that arise from the ribs and often join one another along each side of the body, creating a rigid skeletal box, a skull without a pineal opening, and toothless jaws. Earliest examples are very ancient, dating from the Upper Triassic 215 million years ago. There are around 300 living species of turtles, terrapins, and tortoises. Some species live in and near water, although they cannot breathe or lay eggs in water.

龜鱉目 (目)............	[AS-Academia Sinica]
.................	國家教育研究院－雙語詞彙、學術名詞暨辭書資訊網 September 5, 2011
.................	智慧藏百科全書網 September 5, 2011
.................	大英百科全書線上繁體中文版 September 5, 2011
.................	脊椎動物學（上） 259
Testudines(order)............	[VP]
.................	Animal Diversity Web (1995-) accessed 26 September 2008
.................	Natural History Museum, London (2000-)
.................	Tree of Life Web Project (1995-) accessed 14 August 2008
.................	Oxford English Dictionary Online (2002-) accessed 26 September 2008
.................	McGraw-Hill AccessScience [online] (2007-)
.................	Encyclopedia Britannica Online (2002-) "annotated classification," accessed 14 August 2008accessed 26 September 2008
turtles............	[VP]
.................	BHA Subject Headings (1985-)
.................	Oxford English Dictionary Online (2002-)
.................	Encyclopedia Britannica Online (2002-) accessed 26 September 2008
turtle............	[VP]
.................	Candidate term Candidate term -- MINNHS -- 14 June 1993
.................	Oxford English Dictionary Online (2002-) accessed 26 September 2008
.................	Encyclopedia Britannica Online (2002-)
Chelonia............	[VP]
.................	McGraw-Hill AccessScience [online] (2007-)
chelonians............	[VP]
.................	Oxford English Dictionary Online (2002-)

Getty AAT: 300310264 Getty AAT: http://www.getty.edu/vow/AATFullDisplay?find=costume&logic=AND¬e=&subjectid=300310264
聯合目錄： 龜鱉目 、kuei pieh mu 、guī biē mù 、gui bie mu 、Testudines 、turtles 、turtle 、Chelonia 、chelonians 、Testudines 、Chelonia