هندسهَنْدَسَةٌ [The art of determining the measures and proportions of subterranean channels for water: and hence, the art of architecture: and the practice, and science, of geometry:] a subst. from مُهَنْدِسٌ, q. v. (S, K.) مُهَنْدِسٌ One who determines the measures and proportions of subterranean channels for water: [and hence, an architect: and a geometrician: derived from هِنْدَازٌ, (S, K,) which is Persian [in origin], (S,) arabicized from آبْأَنْدَازْ; (K;) انداز signifying “ the act of measuring,” and آب signifying “ water; ” (TA;) the ز being changed into س because there is not in the [genuine] language of the Arabs a ز after د. (S, K.)