عسم doesn't appear in Hans Wehr's Modern Standard Arabic dictionary, but Lane's Arabic-English Lexicon has 2 entries for it, distinguished by diacritics. Select one below for the full classical Arabic definition.

• عَسِمَ Form 1

  1 عَسِمَ ذ , aor. عَسَمَ , (Msb, K,) inf. n. عَسَمٌ, (S, * Msb, K, *) It (a man's hand, and his foot,) was, or became, distorted, (S, * Msb, K,) [or, accord. to the K, app. said of a man, meaning he was, or became, disto…

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• عَسَمٌ

  عَسَمٌ ذ [mentioned above as an inf. n.] signifies A rigidity in the wrist, and ankle; in consequence of which the hand, and foot, became distorted: (S, K:) or, as some say, a rigidity in a man's wrist: (TA:) or a distor…

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