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the coiled or polyhedral structure, composed of proteins, that encloses the nucleic acid of a virus.
plant bug.
Historical Examples

Handbook of Medical Entomology William Albert Riley
Handbook of Medical Entomology William Albert Riley

any heteropterous bug of the family Miridae (formerly Capsidae), most of which feed on plant tissues, causing damage to crops
the outer protein coat of a mature virus
The protein shell that surrounds a virus particle (known as a virion). See more at virus.


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  • Capstan

    any of various windlasses, rotated in a horizontal plane by hand or machinery, for winding in ropes, cables, etc. a rotating spindle or shaft, powered by an electric motor, that transports magnetic tape past the heads of a tape recorder at a constant speed. Historical Examples They then returned to the boat, let on all […]

  • Capstan-bar

    a long lever for turning a capstan by hand. Historical Examples Into these the bread was pressed by beating it to powder with a capstan-bar. Ocean’s Story; or Triumphs of Thirty Centuries Edward Rowland Madison Washington struck at him with a capstan-bar, and he fell dead at his feet. The Freedmen’s Book Lydia Maria Child […]

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