سَدَرٌ
1.
[see 1]. You say, فِى بَصَرِهِ سَدَرٌ, and
سَمَادِيرُ, In his sight is a confusedness, so that he does not see well. (A.)
2.
Some say that it signifies An affection resembling vertigo, common to a voyager upon the sea: or [simply] vertigo. (TA in article بقل.)