protrusion
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pluralprotrusions
pluralprotrusions
Learner's definition of PROTRUSION
1 [count] : a part that sticks out
- bony protrusions on the outside of the elbow
- a roof with many protrusions
2 [count, noncount] : the act of sticking out or the condition of something that sticks out
- The pain was caused by a/the protrusion of a disc in his lower back.
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