logarithm
n. US //ˈɫɑɡɝˌɪðəm// UK //lˈɒɡəɹˌɪθəm// log·a·rithm
From New Latin logarithmus, term coined by Scottish mathematician John Napier from Ancient Greek λόγος (lógos, “word, reckoning”) and ἀριθμός (arithmós, “number”); compare rational number, from analogous Latin.