Definition of "sinkage"
noun:
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An amount of material involved in a sinking.
from Wiktionary, Creative Commons Attribution/Share-Alike License -
An area of sunken ground; a depression.
from Wiktionary, Creative Commons Attribution/Share-Alike License -
Change in draft a vessel obtains when moving through the water.
from Wiktionary, Creative Commons Attribution/Share-Alike License
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