From sub- + xerophytic. <span class="searchmatch">subxerophytic</span> (not comparable) (ecology) Normally very dry (xerophytic) but with occasional wet periods...
(ecology) Having a very dry environment mesoxerophytic psychroxerophytic <span class="searchmatch">subxerophytic</span> xerophytically xerophytic (plural xerophytics) xerophyte hypertoxic...