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Search Result for "plumbago": 
Wordnet 3.0

NOUN (2)

1. used as a lubricant and as a moderator in nuclear reactors;
[syn: graphite, black lead, plumbago]

2. any plumbaginaceous plant of the genus Plumbago;


The Collaborative International Dictionary of English v.0.48:

Graphite \Graph"ite\, n. [Gr. gra`fein to write: cf. F. graphite. See Graphic.] (Min.) Native carbon in hexagonal crystals, also foliated or granular massive, of black color and metallic luster, and so soft as to leave a trace on paper. It is used for pencils (improperly called lead pencils), for crucibles, and as a lubricator, etc. Often called plumbago or black lead. [1913 Webster] Graphite battery (Elec.), a voltaic battery consisting of zinc and carbon in sulphuric acid, or other exciting liquid. [1913 Webster]
The Collaborative International Dictionary of English v.0.48:

Plumbago \Plum*ba"go\, n. [L., from plumbum lead.] 1. (Min.) Same as Graphite. [1913 Webster] 2. (Bot.) A genus of herbaceous plants with pretty salver-shaped corollas, usually blue or violet; leadwort. [1913 Webster] Plumbean
WordNet (r) 3.0 (2006):

plumbago n 1: used as a lubricant and as a moderator in nuclear reactors [syn: graphite, black lead, plumbago] 2: any plumbaginaceous plant of the genus Plumbago