English

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Etymology

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illustrate +‎ -ory

Adjective

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illustratory (comparative more illustratory, superlative most illustratory)

  1. illustrative (serving to illustrate or explaain)

References

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illustratory”, in Webster’s Revised Unabridged Dictionary, Springfield, Mass.: G. & C. Merriam, 1913, →OCLC.