Definitions

from The American Heritage® Dictionary of the English Language, 5th Edition.

  • noun A protein of high molecular weight that is a major component of the membrane of red blood cells.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

  • noun biochemistry A contractile protein found on the surface of the membranes of blood cells.

Etymologies

from The American Heritage® Dictionary of the English Language, 4th Edition

[spect(e)r (so called because a red blood cell without hemoglobin is called a ghost) + –in.]

Examples

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