It’s hard to have a conversation about wine these days without hearing the French word terroir. Derived from a Latin root meaning “earth,” terroir describes the relationship between a wine and the specific place that it comes from. For example, many will say the characteristic minerality of wines from Chablis comes from the limestone beds beneath the vineyards (although, when pressed, they generally admit that they’ve never actually tasted limestone). The idea that one can taste the earth in a wine is appealing, a welcome link to nature and place in a delocalized world; it has also become a rallying cry in an increasingly sharp debate over the direction of modern winemaking. The trouble is, it’s not true.

When terroir was first associated with wine, in the 17th-century phrase goût de terroir (literally, “taste of the earth”), it was not intended as a compliment. Its meaning began to change in 1831, when Dr. Morelot, a wealthy landowner in Burgundy, observed in his “Statistique de la Vigne Dans le Département de la Côte-d’Or” that all of the wineries in Burgundy made wine essentially the same way, so the reason some tasted better than others must be due to the terroir — specifically, the substrata underneath the topsoil of a vineyard. Wine, he claimed, derived its flavor from the site’s geology: in essence, from rocks.

In recent years, the concept that one can taste rocks and soil in a wine has become popular with wine writers, importers and sommeliers. “Wines express their source with exquisite definition,” asserts Matt Kramer in his book “Making Sense of Wine.” “They allow us to eavesdrop on the murmurings of the earth.” Of a California vineyard’s highly regarded chardonnays, he writes, there is “a powerful flavor of the soil: the limestone speaks.” The sommelier Paul Grieco, in his wine list at Hearth in New York, writes of rieslings that “the glory of the varietal is in its transparency, its ability to truly reflect the soil in which it is grown.” In his February newsletter, Kermit Lynch, one of the most respected importers of French wine, returns repeatedly to the stony flavors in various white wines from a “terroirist” winemaker in Alsace: “When he speaks of a granitic soil, the wine in your glass tastes of it.”

If you ask a hundred people about the meaning of terroir, they’ll give you a hundred definitions, which can be as literal as tasting limestone or as metaphorical as a feeling. Terroir flavors are generally characterized as earthiness and minerality. On the other hand, wines with flavors of berries or tropical fruits and little or no minerality are therefore assumed not to have as clear a connection to the earth, which means they could have come from anywhere, and are thought to bear the mark of human intervention.