plumbago

nouns

used as a lubricant and as a moderator in nuclear reactors

black lead, graphite, plumbago

any plumbaginaceous plant of the genus Plumbago

plumbago

is a member of

shrubs and herbs and woody vines of warm regions: leadwort

is a type of (narrower)

a plant lacking a permanent woody stem; many are flowering garden plants or potherbs; some having medicinal properties; some are pests