*peculator*

n. [ L., a spy, explorer, investigator: cf. F. spéculateur. ] One who speculates. Specifically: (a) An observer; a contemplator; hence, a spy; a watcher. [ Obs. ] Sir T. Browne. [ 1913 Webster ]

(b) One who forms theories; a theorist. [ 1913 Webster ]

A speculator who had dared to affirm that the human soul is by nature mortal. Macaulay. [ 1913 Webster ]

(c) (Com.) One who engages in speculation; one who buys and sells goods, land, etc., with the expectation of deriving profit from fluctuations in price. [ 1913 Webster ]

a. Speculatory; speculative. [ Obs. ] [ 1913 Webster ]