If two child born at a time you call it as twins then how to call a child which born with three or four child at a time?

Answer 1

Two children born at the same time to the same mother are twins:

three = triplets

four = quadruplets

five = quintuplets

six = sextuplets

seven = septuplets

eight = octuplets

nine = nonuplets

ten = decaplets

eleven = undecaplets

twelve = duodecaplets

thirteen = tridecaplets

fourteen = quadecaplets

fifteen = quindecaplets

To the best of my knowledge, the highest recorded multiple births have been decaplets; there have been higher multiple pregnancies recorded, but only ten babies from these pregnancies have been recorded as proceeding to birth.