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There are 3 twelve-letter words beginning with PROTOBIO

protobiology protobiontic protobioside

4 definitions found

protobiology — n. The early study of biology, before it became a rigorous established… — n. (Biology) The study of very small biological structures, such…
protobiontic — adj. Relating to protobionts.
protobioside — n. A particular steroid glycoside.

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