ace·​to-or·​ce·​in | \ˌa-sə-tō-ˈȯr-sē-ən, ə-ˌsē-tō-\

Definition of aceto-orcein 

: a biological stain consisting of orcein in solution with acetic acid Root tips were obtained and stained with aceto-orcein, and root tip squashes were performed.— A. Lane Rayburn et al., Crop Science, 27 Oct. 2005

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First Known Use of aceto-orcein

1949, in the meaning defined above

History and Etymology for aceto-orcein

aceto- + orcein

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The first known use of aceto-orcein was in 1949

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a nest or breeding place

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