1) Biblical tree 2) Book of Chronicles 3) Red sandalwood 
Algum (sometimes rendered Almug) is a type of wood referred to in the Hebrew Bible. ==Biblical reference== According to the Book of First Kings (1 Kings 10:12), and the Second Book of Chronicles (II Chronicles 2:8; 9:10-11), it was used, together with cedar and pine, in the construction of Solomon`s Temple including the crafting of musical instru....
• (n.) Same as Almug (and etymologically preferable). • (n.) A tree or wood of the Bible (2 Chron. ii. 8; 1 K. x. 11).
Al'gum noun Same as Almug (and etymologically preferable). 2 Chron. ii. 8. 
a Biblical tree, possibly the red sandalwood. II Chron. 2:8. Cf. almug.