oar

n

  1. An implement for impelling a boat, being a slender piece of timber, usually ash or spruce, with a grip or handle at one end and a broad blade at the other. The part which rests in the rowlock is called the loom.
  2. An oarsman; a rower; as, he is a good oar.
  3. An oarlike swimming organ of various invertebrates.

v. t. & i.

  1. To row.