pros-, proso- +

(Greek: forward, further, onward; anterior)

prosocoele
1. The foremost cavity of the brain.
2. The ventricular cavity of the prosencephalon.
prosodemic
1. A reference to a disease that is passed from one person to another.
2. Pertaining to or denoting a disease transmitted directly from person to person rather than spread generally; as by a contaminated water supply.
prosogaster
The anterior, chitin-lined, ectodermal portion of the alimentary tract of invertebrates.