zin

from The Collaborative International Dictionary of English v.0.48

Piperazine \Pi*per"a*zine\, n. Also -zin \-zin\ . [Piperidine +
   azote + -ine.] (Chem.)
   A crystalline substance, {(C2H4NH)2}, formed by action of
   ammonia on ethylene bromide, by reduction of pyrazine, etc.
   It is a strong base, and is used as a remedy for gout.
   [Webster 1913 Suppl.]

from The Collaborative International Dictionary of English v.0.48

Pyrazine \Pyr"a*zine\, n. Also -zin \-zin\ . [Pyridine + Gr. ?
   not + ? life.] (Org. Chem.)
   A feebly basic solid, {C4H4N2}, obtained by distilling
   piperazine with zinc dust, and in other ways. Also, by
   extension, any of various derivatives of the same.
   [Webster 1913 Suppl.]

from Easton's 1897 Bible Dictionary

Zin
a low palm-tree, the south-eastern corner of the desert et-Tih,
the wilderness of Paran, between the Gulf of Akabah and the head
of the Wady Guraiyeh (Num. 13:21). To be distinguished from the
wilderness of Sin (q.v.).

from Hitchcock's Bible Names Dictionary (late 1800's)

Zin, buckler; coldness

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