penumbra meaning - definition of penumbra by Mnemonic 365bet中国官方网站

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penumbra

penumbra - 365bet中国官方网站 definition and meaning for word penumbra

Definition
(noun) a fringe region of partial shadow around an umbra

Mnemonics (Memory Aids) for penumbra

pen under an umbrella will be invisble unders umbrella's shadow

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use pen on bra to take the partial shadow of breast

9 13

Nimbus clouds create shaddows.

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when you use umbrella there is shadow ,not the direct rays.

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