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Webster 1828 Edition

Adj.

Talebearing; more generally, obsequiously flattering; parasitic; courting favor by mean adulation.

Sycophantic plants, or parasites, are such as adhere to other plants, and depend on them for support.

sycophantic ‎(comparative more sycophantic, superlative most sycophantic)

obsequious, flattering, toadying