plural noun
Bac·​il·​la·​ri·​a·​les | \ ˌbasə̇ˌlerēˈā(ˌ)lēz\

Definition of Bacillariales

in some especially former classifications
: an order equivalent to Bacillariophyceae

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First Known Use of Bacillariales

1901, in the meaning defined above

History and Etymology for Bacillariales

New Latin, from Bacillaria + -ales

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The first known use of Bacillariales was in 1901

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to complain fretfully

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