IPA: /ˈʃɛdər/
KK: /ˈʃɛdər/
A creature, such as a lobster or crab, that is in the process of shedding its outer shell or has recently done so.
The shedder was carefully examined to ensure it was healthy after molting.
Shedder → The word is formed from "shed" (from Old English *sceadan*, meaning to divide or separate) and the suffix "-er" (meaning a person who). A shedder is a person or thing that separates or discards something.
Think of someone who 'divides' or 'separates' ('shed') something, and the '-er' indicates that this person is doing the action.