Hypertext Webster Gateway: "ferro"
From Webster's Revised Unabridged Dictionary (1913) (web1913)
Ferro- \Fer"ro-\ (Chem.)
A prefix, or combining form, indicating ferrous iron as an
ingredient; as, ferrocyanide.
Additional Hypertext Webster Gateway Lookup
Gateway by dict@stokkie.net
stock only wrote the gateway and does not have any control over the contents;
see the Webster Gateway FAQ,
and also the Back-end/database links and credits.