πρόβολος

A. anything that projects:

I. jutting rock, foreland, ἐπὶ προβόλῳ Od. 12.251: metaph., boulder in the path, obstacle, προβόλοις προσπταίειν interpol.in D. 8.61; λιμένας προβόλων ἐνέπλησας Id. 25.84 (metaph.; also literally, of stones sunk in a harbour, Arr. An. 2.21.7); τὸν λογισμὸν ὡς π. ἐμποδὼν τῇ γλώττῃ κείμενον Plu. 2.510a.

2. πρόβολοι ξύλων projecting barriers of wood to break the force of a stream, Id. Caes. 22.

3. defence, bulwark, π. πολέμου, of a fortress, X. Cyr. 5.3.11 and 23; of a person, shield, guardian, π. ἐμός, σωτὴρ δόμοις Ar. Nu. 1161 (lyr., paratrag.).

II. hunting-spear, Hdt. 7.76; generally, missile, Ph. Bel. 84.11 (pl.).