supplemental

[suhp-luh-men-tl]

adjective

(of a pleading, an affidavit, etc.) added to furnish what is lacking or missing.

noun

anything that is supplemental: supplementals attached to the bill in committee.

Origin of supplemental

First recorded in 1595–1605; supplement + -al1
Related formssup·ple·men·tal·ly, adverbnon·sup·ple·men·tal, adjectivenon·sup·ple·men·tal·ly, adverbpre·sup·ple·men·tal, adjectiveun·sup·ple·men·tal, adjective
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

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Word Origin and History for supplemental
adj.

c.1600, from supplement + -al (1). Related: Supplementally.

Online Etymology Dictionary, © 2010 Douglas Harper