"Forest plot" é a representação gráfica dos resultados de uma meta-análise.

Parece-me que o termo é mais utilizado em inglês; alguns poucos registros trazem "gráfico de floresta".


Wikipedia: [Florest plot]
"A forest plot is a graphical display designed to illustrate the relative strength of treatment effects in multiple quantitative scientific studies addressing the same question. It was developed for use in medical research as a means of graphically representing a meta-analysis of the results of randomized controlled trials. In the last twenty years, similar meta-analytical techniques have been applied in observational studies (e.g. environmental epidemiology) and forest plots are often used in presenting the results of such studies also."

E sobre a origem do nome:
"Forest plots date back to at least the 1970s. One plot is shown in a 1985 book about meta-analysis. The first use in print of the word "forest plot" may be 1996. The name refers to the forest of lines produced. In September 1990, Richard Peto joked that the plot was named after a breast cancer researcher called Pat Forrest and the name has sometimes been spelt "forrest plot."
<href= "http://en.wikipedia.org/wiki/Forest_plot">http://en....

Veja que a definição é a mesma utilizada no verbete "Metanálise" [sic] da Wikipedia em português:
"A metanálise utiliza técnicas estatísticas para combinar em uma medida resumo os resultados de estudos independentes voltados a uma única questão."


Espero que ajude!