Table 1.

Use of selected Latin and Latinate terms in the medical literature

Term	Meaning	First use, PubMed 15	Total uses, PubMed 15
In vitro	In glass	191116	962,506
In vivo	In live beings	191817	482,751
Ex vivo	Out of live beings	19642	27,253
In silico	In computer simulation	199118	6,715
In papyro	On paper	None indexed	0
In populo	In the population	2009	1‡

^‡This essay, excepting five citations with an author last name Populo.