planoconcave

pla·no-con·cave

P p

- US Pronunciation
- US IPA
- UK Pronunciation
- UK IPA
- [pley-noh-kon-keyv, -kon-keyv]
- /ˌpleɪ noʊˈkɒn keɪv, -kɒnˈkeɪv/
- /ˈpleɪ.nəʊˈk.ɒnk.eɪv/

Definition of planoconcave word

adjective planoconcave pertaining to or noting a lens that is plane on one side and concave on the other. 1

before 1685

One of the 48% oldest English words

First recorded in 1685-95; plano-1 + concave

noun

adjective

verb

adverb

pronoun

preposition

conjunction

determiner

exclamation

This term is known only to a narrow circle of people with rare knowledge. Only 7% 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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