ACOUSTIC a.
t, or external passage of the ear. -- Acoustic telegraph, a telegraph making audible signals; a telephone. -- Acoustic vessels, brazen tubes or vessels, shaped like a bell, used in ancient theaters to propel the voices of the actors, so as to render them audible to a great distance.
ACQUAINT v.
To communicate notice to; to inform; to make cognizant; -- followed by with (formerly, also, by of), or by that, introducing the intelligence; as, to acquaint a friend with the particulars of an act. Acquaint her here of my son Paris' love. Shak. I must acquaint you that I have received New dated letters from Northumbe…