cy·clo·mor·pho·sis \ˌ ̷ ̷ ̷ ̷ˈmȯrfəsə̇s sometimes -ˌmȯrˈfōs-\noun (pluralcyclomorpho·ses \-ˌsēz\) Etymology: New Latin, from cycl- + -morphosis : cyclically recurrent polymorphism occurring especially in marine planktonic animals possibly in response to seasonal changes in environmental salinity