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Webster 1913 Edition

Adj.

Preservative.

Bp. Hall.

Noun.

;

pl.

Preservatories

A preservative.

[Obs.]

Whitlock.

A room, or apparatus, in which perishable things, as fruit, vegetables, etc., can be preserved without decay.

Adj.

That tends to preserve.

Noun.

That which has the power of preserving; a preservative.

preservatory ‎(plural preservatories)

(obsolete) A preservative.
(Can we find and add a quotation of Whitlock to this entry?)
(obsolete) A room or apparatus in which perishable things can be preserved without decay.

preservatory ‎(comparative more preservatory, superlative most preservatory)