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spleen an organ near the stomach that stores blood. The spleen gets rid of old red blood cells, and makes certain kinds of white blood cells.
splendid beautiful or grand; making a strong impression. [2 definitions]
splice to join (two pieces of film, tape, or similar things) at the ends. [2 definitions]
splint a thin piece of wood, metal, or plastic used to support and keep steady a broken bone.
splinter a small, sharp piece of material that is broken off from a larger piece. [2 definitions]
split to divide along the length or in layers. [10 definitions]
spoil to damage or ruin; make unable to be used or enjoyed. [4 definitions]
spoke1 past tense of speak.
spoke2 a rod or bar that goes from the center of a wheel to the rim.
spoken past participle of speak. [2 definitions]
spokesman a man who speaks for one or more other persons.
sponge a tiny sea animal that has a body with many holes. Thousands of kinds of sponges live in the ocean. Most kinds of sponges live in groups or colonies on coral reefs, rocks, shells, or other objects. [5 definitions]
spongy like a sponge in being light, full of holes, or able to keep its shape after being pressed or stretched.
sponsor a person who takes responsibility for someone or something. [4 definitions]
spontaneous happening in a free way; not forced. [2 definitions]
spook (informal) a ghost; phantom. [2 definitions]
spool an object shaped like a cylinder with a rim on each end. Thread, tape, wire, and film are wound on spools.
spoon a tool with a small, shallow bowl at the end of a handle, used for eating, stirring, serving, or measuring. [3 definitions]
spoonful the amount a spoon can hold.
spore a tiny reproductive body made up of one or more cells, produced by certain animals and plants. Ferns and fungi produce spores.
sport an athletic event or game played according to rules. Sports often require certain skills and involve two people or teams on opposite sides. [6 definitions]