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Definition of Term

(English) Large group of lower animals that lack a spinal column. (See also: vertebral column, vertebrates, protozoans)
(French) Grand groupe d'animaux inférieurs qui ne possèdent pas de colonne vertébrale. (See also: vertebral column, vertebrates, protozoans)
(Portuguese) Grande grupo de animais inferiores sem coluna vertebral. (See also: vertebral column, vertebrates, protozoans)

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