Word: mainline
Part of speech: Adjective
Syllables: main
line
Definition: Normal, principal or standard.
Morphemes:
Affix: main
Language: en
PoS: Adjective
Meaning: Of chief or leading importance; prime, principal.
Affix: line
Language: en
PoS: Noun
Meaning: Proper relative position or adjustment (of parts, not as to design or proportion, but with reference to smooth working).