pinhole

== English == === Alternative forms === pin-hole === Etymology === From pin +‎ hole. === Pronunciation === (General American) IPA(key): /ˈpɪnˌhoʊl/ === Noun === pinhole (plural pinholes) A small hole, of a size that could have been made by a pin The aperture in a pinhole camera or camera obscura (networking) A port left unprotected by a firewall to allow a particular application to gain access to a service. (meteorology) A clipping of pinhole eye, which refers to the compact eye structure associated with intense tropical cyclones. ==== Derived terms ==== === Verb === pinhole (third-person singular simple present pinholes, present participle pinholing, simple past and past participle pinholed) (transitive) To form one or more pinholes in. === Anagrams === lophine