What is the meaning of Proto-?

An early, primitive stage of development.

Original, older.

First in order; which stage is first.

Primary.

Most recent common ancestor (often hypothetical) of.

A minimal proportion of a particular substance when in a combination. See protosalt.

Relating to protons and/or positive charge.

Anterior.

proto-

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proto- (initial, first, original)

proto-

proto-

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proto-

Source: wiktionary.org