is [is] [ME, fr. OE; akin to OHG ist is (fr. sin to be), L est (fr. esse to be), Gk esti (fr. einai to be)] pres 3d sing of be, dial pres 1st & 2d sing of be, substand pres pl of be
IS- [IS-] OR ISO- COMB FORM [LL, FR. GK, FR. ISOS EQUAL] 1: EQUAL: HOMOGENEOUS: UNIFORM "ISENTROPIC"2: ISOMERIC "ISOCYANATE"3: FOR OR FROM DIFFERENT INDIVIDUALS OF THE SAME SPECIES "ISOAGGLUTININ"
Meaning of IS- [IS-] OR ISO- COMB FORM [LL, FR. GK, FR. ISOS EQUAL] 1: EQUAL: HOMOGENEOUS: UNIFORM "ISENTROPIC"2: ISOMERIC "ISOCYANATE"3: FOR OR FROM DIFFERENT INDIVIDUALS OF THE SAME SPECIES "ISOAGGLUTININ" in English
Merriam-Webster English vocab. Английский словарь Merriam Webster. 2012