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“topophone”
topophone
A double ear trumpet for estimating the direction from which sounds proceed; especially, for the use of navigators.
This entry is located in the following units:
phon-, phono-, -phone, -phonia, -phonic, -phonetic, -phonous, -phonically, -phonetically, -phony +
(page 20)
topo-, top-, -topia, -topy, -topism, -topic
(page 5)