The Term 'Productive'

From: Richard Wordingham
Message: 15355
Date: 2002-09-10

--- In cybalist@..., Miguel Carrasquer <mcv@...> wrote:
> In linguistics, a "productive" suffix (e.g. a productive diminutive
suffix) is a
> suffix which continues to be used in the formation of new composite
words.

What is a 'productive' phoneme? I have seen the term applied to a
vowel in an uninflected proto-language, but the only meaning I could
see from the context was that the phoneme occurred in a lot of
words. Is there some nuance I missed?

Richard.