Shrinking

a. & n.

1.

a. & n. from Shrink. Shrinking head (Founding) a body of molten metal connected with a mold for the purpose of supplying metal to compensate for the shrinkage of the casting; - called also sinking head, and riser.

Noun	1.	shrinking - process or result of becoming less or smaller; "the material lost 2 inches per yard in shrinkage" Synonyms: shrinkage
	2.	shrinking - the act of becoming less

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