Jletter. The tenth letter of the Latin alphabet ; called i lunga in Italian ; jn. See under J ; jabm. jab (boxing punch) ; jacanaf. jacana ; jacobianom. Jacobian (all senses) ; jacobsitef. jacobsite ; Jacopoprop. given name ; Jacoponeprop. given name ; jacquardm. Jacquard ; Jacuzziprop. surname ; Jafetprop. Japheth ; jainismom. Jainism ; jarovizzazionef. vernalization ; jasmonicoadj. jasmonic ; jatom. obsolete spelling of iato ; jazzadj. jazz [attributive] ; jazzm. jazz ; jazzistamf. jazz musician ; jazzer ; jazzisticoadj. jazz [attributive] ; jazzofilom. jazzophile ;