plumbago

• Nom masculin avec deux sens distincts : un minéral gris foncé et tendre, utilisé comme lubrifiant et modérateur dans les réacteurs nucléaires ; ou toute plante du genre Plumbago, souvent cultivée pour ses fleurs ornementales.

A noun with two distinct meanings: a soft, dark gray mineral used as a lubricant and as a moderator in nuclear reactors; or any plant of the genus Plumbago, often grown for its ornamental flowers.

1. GraphiteC1formaltechnical

   A soft, black, crystalline form of carbon used as a lubricant and as a moderator in nuclear reactors.

   Graphite

   • Plumbago is commonly used in pencil leads.
   • The nuclear reactor uses plumbago as a moderator.
   • Industrial lubricants often contain plumbago.

   Synonymesgraphite

2. Leadwort plantC1formal

   Any plant of the genus Plumbago, typically with blue or white flowers, also known as leadwort.

   Plumbago (plante)

   • The garden was filled with beautiful plumbago flowers.
   • Plumbago is often grown as an ornamental plant in warm climates.
   • She planted a plumbago bush near the fence.

   Synonymesleadwort