Why was "tantrum" trending last week?
c.1300, "plate of armor," probably from Middle Low German splinte, splente "thin piece of iron," related to Middle Dutch splinte "splint," probably ultimately from PIE *(s)plei- "to split, splice" (see flint). Cognate with Danish splint "splinter," Swedish splint "wooden peg, wedge." Meaning "slender flexible slip of wood" is recorded from early 14c.; specific surgical sense is attested from c.1400.
A rigid device used to prevent motion of a joint or of the ends of a fractured bone.
A dental appliance put on the teeth to protect them from grinding or from moving out of place.