the alteration or omission of a consonant as a result of being dissimilated
3. biology a less common word for catabolism
dissimilation in American English
(dɪˌsɪməˈleɪʃən)
noun
1.
a making or becoming dissimilar
2. Linguistics
a process of linguistic change in which one of two similar or identical phonemes within a word or phrase becomes unlike the other (Ex.: OFr marbre becomes Eng marble; L peregrinus becomes It pellegrino)