PENTACROS'TIC, adjective [Gr. five, and acrostic.] Containing five acrostics of the same name in five divisions of each verse. PENTACROS'TIC, noun A set of verses so disposed as to have five acrostics of the same name in five divisions of each verse.
Source: Webster's 1828 American Dictionary ↗ · public-domain · returned verbatim, no AI