هَمْزُ الشَّيْطَانِ
1.
was explained by Mohammad as meaning (tropical:) Madness, or insanity; synonym مُوتَةٌ, i. e. جُنُونٌ; because it arises from the goading and pressing or pinching of the devil. (A 'Obeyd, K.) See 1; and see also هَمَزَات, voce هَمْزَةٌ.
2.
هَمْزٌ, (S,) and هَمْزَةٌ, (Kh, TA,) [the former a gen. n., and the latter the n. un.,] The sister of alif; one of the letters of the alphabet; [written thus;] a genuine word, old, heard [from the Arabs of classical times], and well known; so called for a reason mentioned above: see 1, last signification: so says Kh; therefore no regard is due to what is said in certain of the expositions of the Keshsháf, that the term همزة thus used has not been heard [from any of the Arabs of classical times], and that its name is أَلْفٌ: (TA:) several persons say, that the term همزة is mostly applied to the movent [alif], and الف to the quiscent letter. (MF, TA.) See the letter ا.