Hypertext Webster Gateway: "sinter"
From Webster's Revised Unabridged Dictionary (1913) (web1913)
Sinter \Sin"ter\, n. [G. Cf. {Cinder}.] (Min.)
Dross, as of iron; the scale which files from iron when
hammered; -- applied as a name to various minerals.
{Calcareous sinter}, a loose banded variety of calcite formed
by deposition from lime-bearing waters; calcareous tufa;
travertine.
{Ceraunian sinter}, fulgurite.
{Siliceous sinter}, a light cellular or fibrous opal;
especially, geyserite (see {Geyserite}). It has often a
pearly luster, and is then called pearl sinter.
From WordNet (r) 1.7 (wn)
sinter
v : used of powdery metals or ores; to cause to become a
coherent mass by heating without melting
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