ˌmīd.əˈmīs ə n noun
( -s )
Etymology: perhaps from mit- + -mycin
: a complex of antibiotic substances that is produced by a Japanese streptomyces ( Streptomyces caespitosus ) ; especially : one form C 15 H 18 N 4 O 5 that inhibits DNA synthesis and is used as an antineoplastic agent