Word Study
serio-comic
CIDE DICTIONARY
serio-comic, a.
Having a mixture of seriousness and sport; serious and comical. [1913 Webster]
OXFORD DICTIONARY
serio-comic, adj. combining the serious and the comic, jocular in intention but simulating seriousness or vice versa.
Derivative
serio-comically adv.
For further exploring for "serio-comic" in Webster Dictionary Online