xerophile

n. organism adapted to grow with a limited supply of water

Xerophiles are extremophilic organisms that can grow and reproduce in conditions with a low availability of water, also known as water activity.  Water activity (aw) is a measure of the amount of water within a that an organism can use to support growth. Xerophiles are often said to be "xerotolerant", meaning tolerant of dry conditions. They can survive in environments with water activity below 0.8.  Endoliths and halophiles are often xerotolerant.
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Noun
1. plant adapted for life with a limited supply of water; compare hydrophyte and mesophyte
(synonym) desert plant, xerophyte, xerophytic plant, xerophilous plant
(hypernym) vascular plant, tracheophyte
(hyponym) agave, century plant, American aloe

adj. xerophil

XEROFILO