Trema may refer to:
a Greek and Latin root meaning hole Trema, a term for the two dots (diacritic) , (French), a diaeresis Trema (plant), a genus of about 15 species of small evergreen trees Tréma (record label), a French record label, now defunct Trema, Croatia, a village near Sveti Ivan Žabno in central Croatia a term coined by German neurologist Klaus Conrad in his 1958 monograph on schizophrenia
See also Pseudomonas tremae Trematoda Trematosauria