P
proto-consonant
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(evolutionary biology; not well differentiated vowel) πρωτοφωνήεν ο
Dictionary entry: proto-vowel
Thank you for reaching out! As you have probably already noticed this term in not yet in our English base and can thus not yet be translated. I see you already sent a report to the English team. They will consider it and should they add the term in question we will also add the Greek translation.