تُرْسٌ

[A shield;] a certain piece of defensive armour; (M, TA;) a thing well known: (A, Msb, K:) plural تِرَسَةٌ and تِرَاسٌ (S, M, Msb, K) and تِرَاسَةٌ (S) and تُرُوسٌ, [all pls. of mult.,] and أَتْرَاسٌ, [a plural of pauc.,] (S, M, Msb, K,) but not أَتْرِسَةٌ. (ISk, S, Msb.) A تُرْس that is made of skins, without wood and without sinews in it, is called حَجَفَةٌ and دَرَقَةٌ. (Msb.)

Also (tropical:) The disk of the sun. (A, * TA.)

And (tropical:) A smooth, round, level piece of ground: (A, TA:) or a rugged piece of hard, or hard and level, ground. (Ibn- 'Abbád, K.)

See also مَتَرْسٌ.