Definitions

1. noun

A hypothetical or theoretical joint or branch-like structure in a branching or jointed system, especially in the context of arthropod anatomy.

“The scientist studied the arthrobranch of the ancient insect fossil to understand its evolution.”

2. noun

A specific type of branching or jointed structure in a particular organism or system.

“The arthrobranch of the sea star is a unique example of its adaptation to the marine environment.”