American Dictionary of the English Language

DERIVABLE, adjective

1. That may be derived; that may be drawn, or received, as from a source. Income is derivable from land, money or stocks.

2. That may be received from ancestors; as an estate derivable from an ancestor.

3. That may be drawn, as from premises; deducible; as an argument derivable from facts or preceding propositions.

4. That may be drawn from a radical word; as a word derivable from an Oriental root.