| Title | plano-concave |
|---|---|
| Text |
Merriam-Webster's Collegiate Dictionary pla·no-con·cave \\ˌplā-nō-(ˌ)kän-ˈkāv, -ˈkän-ˌ\\ adjective DATE 1693 : flat on one side and concave on the other Webster's Third New International Dictionary, Unabridged pla·no-concave \|plā(ˌ)nō+\ adjective Etymology: plan- (II) + concave : flat on one side and concave on the other — see lens illustration |
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