SKIP TO CONTENT

plumbago

Definitions of plumbago
  1. noun
    used as a lubricant and as a moderator in nuclear reactors
    synonyms: black lead, graphite
    see moresee less
    types:
    lead, pencil lead
    mixture of graphite with clay in different degrees of hardness; the marking substance in a pencil
    pencil
    graphite (or a similar substance) used in such a way as to be a medium of communication
    type of:
    C, atomic number 6, carbon
    an abundant nonmetallic tetravalent element occurring in three allotropic forms: amorphous carbon and graphite and diamond; occurs in all organic compounds
  2. noun
    any plumbaginaceous plant of the genus Plumbago
    see moresee less
    type of:
    herb, herbaceous plant
    a plant lacking a permanent woody stem; many are flowering garden plants or potherbs; some having medicinal properties; some are pests
Word Family
EDITOR’S CHOICE

Test prep from the experts

Boost your test score with programs developed by Vocabulary.com’s experts.

  • Proven methods: Learn faster, remember longer with our scientific approach.
  • Personalized plan: We customize your experience to maximize your learning.
  • Strategic studying: Focus on the words that are most crucial for success.

SAT/PSAT

$29.95
  • Number of words: 500+
  • Duration: 8 weeks or less
  • Time: 1 hour / week

TOEFL

$29.95
  • Number of words: 500+
  • Duration: 10 weeks or less
  • Time: 1 hour / week

ACT

$29.95
  • Number of words: 700+
  • Duration: 10 weeks
  • Time: 1 hour / week