The Collaborative International Dictionary of English v.0.48:
Raker \Rak"er\ (r[=a]k"[~e]r), n. [See 1st Rake.] 1. One who, or that which, rakes; as: (a) A person who uses a rake. (b) A machine for raking grain or hay by horse or other power. (c) A gun so placed as to rake an enemy's ship. [1913 Webster] 2. (Zool.) See Gill rakers, under 1st Gill. [1913 Webster]