• word of the day

    penumbra

    penumbra - Dictionary 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

use pen on bra to take the partial shadow of breast

Nimbus clouds create shaddows.

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

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