Exocycloida
plural noun
Ex·o·cy·cloi·da
ˌek(ˌ)sōˌsīˈklȯidə
: an order of sea urchins comprising forms with the periproct posterior or oral in position and including the heart urchins and sand dollars
Word History
Etymology
New Latin, from exo- + cycl- + -oida
- scratches out
- scratchest
- scratchier
- scratchiest
- scratchilier
- scratchiliest
- scratchily
- scratchiness
- scratchinesses
- scratching
- scratching (out)
- scratching off
- scratching out
- scratching post
- scratchings
- scratchless
- scratchpads
- scratchproof
- scratchweed
- scratchwork
- scratchy
- scrats
- scratted
- scratting
- scrattle