ragweed

• Nom désignant un type de plante souvent considérée comme une mauvaise herbe, connue pour produire un pollen très allergène qui peut provoquer le rhume des foins et l'asthme.

A noun referring to a type of plant, often considered a weed, known for producing highly allergenic pollen that can cause hay fever and asthma.

1. Common ragweedB2formalscientific

   A widespread European weed with yellow daisylike flowers; sometimes an obnoxious weed and toxic to cattle if consumed in quantity.

   Ambroisie à feuilles d'armoise

   • Ragweed can be toxic to cattle if they eat too much of it.
   • The farmer tried to control the ragweed in his fields.
   • This European weed has yellow flowers that resemble daisies.

   Synonymesragworttansy ragwort

2. Allergenic ragweedB2formalamericanscientific

   Any of numerous chiefly North American weedy plants of the genus Ambrosia that produce highly allergenic pollen responsible for hay fever and asthma.

   Ambroisie allergisante

   • Ragweed pollen is a major cause of seasonal allergies.
   • Many people suffer from hay fever due to ragweed in late summer.
   • The plant's pollen can trigger asthma attacks in sensitive individuals.

   Synonymesambrosiabitterweed