Shrinking, 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.
Shades of meaning
Fernald lists shrinking only as an antonym, under brave, effrontery, ostentation.
He lists it without comment; the entries above explain its neighbors.
Synonyms
none given