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There are 4 eleven-letter words beginning with PROTOBI

protobiface protobinary protobionts protobiotic

4 definitions found

protobiface — n. A primitive biface chopping tool.
protobinary — adj. (Astronomy) Describing a system that is evolving into a binary star.
protobionts — n. Plural of protobiont.
protobiotic — adj. (Biochemistry) That gave rise to early life.

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