Sissoo \Sis*soo"\, n. [Hind. s[=i]s?.]

(Bot.) A leguminous tree (Dalbergia Sissoo) of the northern parts of India; also, the dark brown compact and durable timber obtained from it. It is used in shipbuilding and for gun carriages, railway ties, etc.

Source: Webster's Revised Unabridged Dictionary (1913)