secular
adj.— «In Wall Street parlance, a very long period of falling or, at best, sideways-moving stock prices is termed a “secular” bear market. And there have been some doozies in relatively recent U.S. history.» —“What to do if stocks’ troubles go on…and on” by Tom Petruno Los Angeles Times (California) June 28, 2008. (source: Double-Tongued Dictionary)
Further reading
The archaic English word ruelle means “the space between a bed and the wall.” It’s adapted from French ruelle meaning “a small alley or lane.” This is part of a complete episode.
Related
Have you ever googled your own name and found someone else who goes by the very same moniker? There’s a word for that: googleganger. Plus, the language of hobbyists and enthusiasts: If you’re a beekeeper, perhaps you call yourself a...
I believe this is just OED sense 8 of secular:
“Econ. and Statistics. Of a fluctuation or trend: occurring or persisting over an unlimited period; not periodic or short-term.”