Overall, the argument $x$ of $\ln(x)$ must be unitless, and a log transformed quantity must be unitless. If $x = 0.5$ is measured in some units, say, seconds, then taking the log actually means $\ln(0.5s/1s) = \ln(0.5)$.
Definition of CHRISTOLOGY. : theological interpretation of the person and work of Christ. â ChrisÂ·toÂ·logÂ·iÂ·cal \Ëkris-tÉ-Ëlae-ËlÃ¤-ji, kÉl-\ ËkrÄ«s. ADJECTIVE. advertisement
Quick Answer. According to The Free Dictionary, etiology, also spelled aetiology, is the study of exploration of the cause or factors contributing to something. In pathology, it specifically denotes the investigation into the cause or origins of a disease.