bacillariaceous
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bacillariaceous — bac·il·la·ri·a·ceous … English syllables
diatomaceous — |dīəd.ə|māshəs, (|)dīˌad.ə adjective Etymology: New Latin Diatomaceae (I) + English ous 1. : bacillariaceous 2. : consisting of or abounding in diatoms or their siliceous remains … Useful english dictionary