The technical term refers to a colloidal substance in an aqueous solution. Thus, there are lots of things that are latex. Practically, health care uses the term for products that contain natural rubber latex originating from the rubber tree, Hevea braziliensis. Approximately 16 of the over 250 proteins from the Hevea latex are allergenic proteins (allergens). Note most prone to latex allergy are spinabifida and other patients with surgeries within a few weeks of birth with multiple latex contact procedures there after.