Onomatopeia

Lifestyle / Poetry / Onomatopeia : An instance where the sound of a word directly imitates its meaning (for example, 'choo-choo,' 'hiss'), sometimes termed echoism.
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Permeable

Lifestyle / Painting / Permeable: Allows another material to pass through without effecting the existing material. MORE

Permian Period

Science / Biology / Permian Period: The last geologic time period of the Paleozoic Era, noted for the greatest mass extinction in earth history, when nearly 96% of species died out. MORE

Permission

Technology / Email / Permission: The implicit approval given when a person actively requests to have their own email address added to a list. MORE

Permeability

Business / Construction / Permeability: A measure of the ease with which water penetrates a material. MORE

Permanganate

Science / Chemistry / Permanganate: Permanganate ion (mno4-) is a powerful oxidizing agent used in chemical analysis and water treatment. The ion has an intense purple color. MORE

Permanent Teeth

Health / Dentistry / Permanent Teeth: The thirty-two adult teeth that replace the baby, or primary teeth. Also known as secondary teeth. MORE