Extremely cold; icy.
The weather is gelid on a recent Thursday night--so uninviting that it's hard to imagine anyone venturing out.
--Letta Tayler, "The Accent's on Brooklyn," [?]Newsday, April 6, 2000
Last January a major crisis arose when the Argentine naval supply ship Bahia Paraiso foundered near an island off the Antarctic Peninsula, creating a diesel-oil spill that inflicted untold damage on the ecosystems clinging to the edges of the icy continent or swimming in its gelid seas.
--Christopher Redman Paris, "Could anything be more terrible than this silent, windswept immensity?" [?]Time, October 23, 1989
Gelid comes from Latin gelidus, from gelu, "frost, cold."