Definition of Derivable

Babylon English Dictionary
capable of being formed or developed from something else
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Derivable Definition from Language, Idioms & Slang Dictionaries & Glossaries
Webster's Revised Unabridged Dictionary (1913)
(a.)
That can be derived; obtainable by transmission; capable of being known by inference, as from premises or data; capable of being traced, as from a radical; as, income is derivable from various sources.
  
Webster's Revised Unabridged Dictionary (1913), edited by Noah Porter. About
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derivable
\de*riv"a*ble\ (?), a. [from derive.] that can be derived; obtainable by transmission; capable of being known by inference, as from premises or data; capable of being traced, as from a radical; as, income is derivable from various sources. all honor derivable upon me. the exquisite pleasure derivable from the true and beautiful relations of domestic life. g. bell. the argument derivable from the doxologies. h. newman.

WordNet 2.0

Adjective
1. capable of being derived
(similar) derived