hydrophobic

adj. suffering from hydrophobia (abnormal fear of water); lacking attraction for water

For other uses, see HydrophobiaIn chemistry, hydrophobicity (from the combining form of water in Attic Greek hydro- and for fear phobos) refers to the physical property of a molecule (known as a hydrophobe) that is repelled from a mass of water . Hydrophobic molecules tend to be non-polar and thus prefer other neutral molecules and nonpolar solvents. Hydrophobic molecules in water often cluster together forming micelles. Water on hydrophobic surfaces will exhibit a high contact angle.
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Adjective
1. lacking affinity for water; tending to repel and not absorb water; tending not to dissolve in or mix with or be wetted by water
(antonym) hydrophilic
(classification) chemistry, chemical science
2. abnormally afraid of water
(synonym) aquaphobic
(similar) afraid(p)

(a.)
Of or pertaining to hydrophobia; producing or caused by rabies; as, hydrophobic symptoms; the hydrophobic poison.
  

Having a strong aversion for water.