Crossword Clue:

pertaining to the refraction of sound

AnswerCrossword Clue
MEDIEVALPertaining to the time of castles and knights
OTICPertaining to the ear
SELENICPertaining to the moon
THEMATICPertaining to the subject
BASALPertaining to the lowest possible level
AFRICPertaining to the second-largest continent