noun. 
                    The protuberance through which milk is drawn from the breast or mamma; the mammilla; a teat; a pap.
                  
                
                  
                    noun. 
                    The orifice at which any animal liquid, as the oil from an oil bag, is discharged.
                  
                
                  
                    noun. 
                    Any small projection or article in which there is an orifice for discharging a fluid, or for other purposes
                  
                
                  
                    noun. 
                    A pipe fitting, consisting of a short piece of pipe, usually provided with a screw thread at each end, for connecting two other fittings.
                  
                
                  
                    noun. 
                    a short pipe, usually of brass, one end of which is tapered and adapted for attachment to the end of a lead pipe by soldering.