RhymeZone: sinople definitions

Definitions of sinople:

noun: (obsolete) A shade of red; sinoper.
noun: (obsolete) Sinoper, a kind of red earth historically used as a pigment, originally imported to Greece from Sinope in Paphlagonia.
noun: (mineralogy) Ferruginous quartz of a blood-red or brownish red colour, sometimes with a tinge of yellow, used to make the pigment sinopia.
noun: (obsolete, heraldry) Vert (green).

(Definitions from Wiktionary)