permanent echo

per·ma·nent ech·o

P p

Definition of permanent echo words

noun permanent echo a radar signal reflected to a radar station on the ground by a building or other fixed object. 1

noun

adjective

verb

adverb

pronoun

preposition

conjunction

determiner

exclamation

This term is known only to a narrow circle of people with rare knowledge. Only 6% of English native speakers know the meaning of this word.

According to our data most of word are more popular. This word is almost not used. It has a much more popular synonym.

This diagram is provided by Google Ngram Viewer

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