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Santonine, son′to-nin, n. a colourless crystalline poisonous compound contained in Santonica.

Worm′-pow′der, a vermifuge; Worm′-seed, santonica: the treacle mustard; Worm′-wheel, a wheel gearing with an endless screw or worm, receiving or imparting motion.—adj.

The chief vegetation round the camp, is Santonica. 

Botanical features continue the same, Santonica being still the prevailing plant. 

They are covered with Centaurea fruticosa, and C. spinosa, a favourite food of camels when it has young shoots, Santonica, Statice, all of which grow precisely as before, Boragineæ, Compositæ, Labiatæ, and Papilionaceæ, are the predominant forms, and mostly of the same type: I observe a tendency among Boragineæ to have cup-shaped nuts.