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
cytology. n. 1. (Microbiology) the study of plant and animal cells, including their structure, function, and formation. 2. (Microbiology) the detailed structure of a tissue, as revealed by microscopic examination.