صم

صَمِيمٌ ذ The bone that is the [ main ] stay, or support, of the limb or member or the like; (M, K, and Ham p. 302;) as the صميم [or principal bone] of the shank (M and Ham) of a beast, (M,) and that of the head; (M and Ham;) opposed to وَشِيظٌ, because the latter is smaller than the former: (M:) and the thing that is the [ main ] stay, or support, of another thing. (Ham p. 359.) ― -b2- [Hence,] The heart: so in a saying of a poet cited voce دَلَفَ. (Ham p. 678.) ― -b3- And hence, also, (TA,) (tropical:) The prime, principal, or most essential, part; (M, K, TA;) the choice, best, or most excellent, part; of a thing (S, M, Msb, K, TA) of any kind. (M.) One says, هُوَ فِى صَمِيمِ قَوْمِهِ (tropical:) [ He is of the choice, best, or most excellent, of his people or party; of the main stock thereof; or of those that constitute the members, exclusive of such as are followers, or incorporated confederates, thereof ]: (S, TA:) contr. of شَظًى (S in art. شظى) [and of شِقٌّ, q. v.]. ― -b4- And (tropical:) The greatest intenseness or vehemence or violence, or the most intense or vehement or violent degree, of heat, and of cold: (S, K, TA:) or simply the intenseness or vehemence or violence thereof. (M.) ― -b5- And (assumed tropical:) The middle [or core ] of the heart. (Msb.) ― -b6- And The shell (lit. the dry, or hard, exterior covering ) of the egg. (K.) -A2- Also an epithet, applied to a man, (M, K,) and to a woman, and to two persons (M,) and to a pl. number, (M, K,) (tropical:) Pure, unmixed, or genuine, in respect of race, lineage, or parentage. (M, K, TA.)