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Webster 1913 Edition
Pittacal
Pit′ta-cal
(pĭt′tȧ-kăl)
, Noun.
[Gr.
πίττα
, πίσσα
, pitch + καλόσ
beautiful: cf. F. pittacale
.] (Chem.)
A dark blue substance obtained from wood tar. It consists of hydrocarbons which when oxidized form the orange-yellow eupittonic compounds, the salts of which are dark blue.