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Webster 1913 Edition

Adj.

[L.

spadix

-icis

, a date-brown or nut-brown color. See

Of a bright clear brown or chestnut color.

Sir T. Browne.

(Bot.)

Bearing flowers on a spadix; of the nature of a spadix.

spadiceous ‎(comparative more spadiceous, superlative most spadiceous)

Of a bright clear brown or chestnut colour.
(Can we find and add a quotation of Sir Thomas Browne to this entry?)
(botany) Bearing flowers on a spadix; of the nature of a spadix.