Sentence:  <WSD>Male</WSD> adapter connects female pipe threads to polyethylene cold-water pipe; [...] female flare coupling connects <WSD>male</WSD> pipe threads to flared copper or plastic; 
Meaning of the word marked with <WSD> tags:  Of instruments, tools, or connectors: designed to fit into or penetrate a female counterpart, as in a connector, pipe fitting or laboratory glassware. (from 16th c.)