One of the ways children simplify language by repeating a single syllable of a word in order to represent the whole word, e.g., “wa-wa” for water.
Doubling of the heart sounds, which may be heard in healthly individuals and shows variation with respiration due to the slightly asynchronous closure of the heart valves.
A doubling, as of the heart sounds in some morbid conditions.
The multiplication of sudden and severe episodes in certain types of intermittent fever.
The duplication of either the first or second heart sounds.