blubber

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blubber

(blŭb′ər)
n.
1. The thick layer of fat between the skin and the muscle layers of whales and other marine mammals, from which an oil is obtained.
2. Excessive body fat.
adj.
Swollen and protruding: blubber cheeks.

blub′ber·y adj.
The American Heritage® Medical Dictionary Copyright © 2007, 2004 by Houghton Mifflin Company. Published by Houghton Mifflin Company. All rights reserved.

blubber

the thick layer of fat deposited below the DERMIS which acts as a thermal insulation layer in some mammals, e.g. whales, seals.
Collins Dictionary of Biology, 3rd ed. © W. G. Hale, V. A. Saunders, J. P. Margham 2005