IPA: /ˈsɛdɪˌmɛntəbl/
KK: /sɛdɪˈmɛntəbl/
Able to be separated from a liquid and settled at the bottom, often through a process like centrifugation.
The particles in the mixture are sedimentable, allowing them to be easily removed by spinning in a centrifuge.
Sedimentable → It is formed from "sediment" (from Latin "sedimentum", meaning something that settles) and "-able" (meaning capable of). The word "sedimentable" refers to something that is capable of being settled or deposited.
Think of something that can 'settle' ('sediment') and is 'capable of' ('-able') doing so — that's what sedimentable means.