Agnatha

[ ag-nuh-thuh ]
/ ˈæg nə θə /
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noun

the class of vertebrates comprising the lampreys, hagfishes, and several extinct forms, having no jaws or paired appendages.

Origin of Agnatha

1875–80; < New Latin, equivalent to Greek a- a-6 + -gnatha, neuter plural of -gnathos -gnathous
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

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