passaging
- 1Present participle and gerund of passage.
Researchers are passaging the cultures every three days to maintain steady growth.
Passaging the cell line too many times can alter its original characteristics.
Note
Laboratories keep this form busiest. Passaging a cell line or a pathogen means moving it through a fresh host or medium, and the verb takes a direct object: passaging the culture, passaging the virus through a host. The same spelling also serves two rarer verbs, crossing (especially by sea) and performing a passage movement, which takes no object. The presence of an object usually tells them apart.
passaging is a form of passage
passage, verb: To put something, such as a pathogen or stem cell, through a host or culture medium, typically to propagate it. Full entry
- Spelling
- passage → passaging: drop the e, add -ing
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