When referring to sparkling wine, what do ‘bead,’ ‘mousse’ and ‘perlage’ mean?

Dear Dr. Vinny,

When talking about Champagne, are the “bead,” “mousse” and “perlage” the same things?

—Kristin, Parkville, Mo.

Dear Kristin,

I love answering reader questions about bubbly! As you probably know, bubbles make Champagne and other sparkling wines special. Those bubbles are thanks to the presence of carbon dioxide dissolved in the wine. That magical gas gets into the wine via a secondary fermentation in the bottle in the case of traditional method sparklers, such as Champagne, Cava, Trentodoc and Franciacorta. That secondary fermentation can also happen in a large tank, as in the case of Prosecco and other bubblies.

Because bubbles are an essential part of what makes these wines so enjoyable, a vocabulary has developed to describe their quality and character. Ideally, the bubbles will be fine, not coarse (you may even hear especially fine bubbles described as “creamy”). Bubbles help deliver aromatics and a fresh, palate-cleansing sensation, so hopefully there will also be a steady, vigorous stream of them while you’re enjoying a glass. How the wine was made, how old it is and how cold it’s served will all affect the quality and quantity of the bubbles. As Champagne ages, for instance, it loses its fizz—but that’s not necessarily a bad thing.

Not everyone will use these three terms the same way. In general, the “mousse” refers to the overall fizziness or effervescence, or to the frothy head that might form at the top of the wine. The tiny bubbles can be called the “pearl.” “Perlage” is French for “string or chain of pearls,” so the term could describe a string of bubbles that looks like a pearl necklace, often around the surface of the wine.

Meanwhile, I think the “bead” most often refers to the trail of bubbles rising from the bottom of the glass to the surface of the wine. Of course, that could also be “perlage” to a different observer.

I asked my colleague Alison Napjus, lead taster for the wines of Champagne and many other global sparklers, to weigh in. She agrees that “generally speaking, you could consider the three terms to be interchangeable ways to describe the effervescent component of sparkling wines.”

That said, she thinks “bead” often implies “greater definition” and livelier bubbles, while “mousse” implies creamier bubbles and perlage indicates finer, softer, smaller bubbles.

I say all this terminology talk calls for some crowdsourcing. The next time you pop a bottle of bubbly, why not ask your companions which word they’d use to describe the wine’s bubbles? And please report back with your findings. Cheers!

—Dr. Vinny