Definition of "virtuall"

[H]is ſenſes flame / Flovv'd from his parts, vvith force ſo virtuall, / It fir'd vvith ſence things meere inſenſuall.

1598, George Chapman, “Third Sestyad”, in Christopher Marlo[w]e, George Chapman, Hero and Leander: […], London: […] A[ugustine] M[atthews] for Richard Hawkins: […], published 1629

Take an Apple, &c. and pricke it vvith a Pin full of Holes, not deepe, and ſmeare it a little vvith Sacke, or Cinnamon vvater, or Spirit of vvine, euery day for ten dayes, to ſee if the Virtuall Heat of the VVine, or Strong VVaters, vvill not Mature it.

1631, Francis [Bacon], “IV. Century. [Experiments in Consort Touching Maturation, and the Accelerating thereof. And First Touching the Maturation and Quickening of Drinks. And Next Touching the Maturation of Fruits..]”, in Sylua Syluarum: Or A Naturall Historie. In Ten Centuries. […], 3rd edition, London: […] William Rawley; [p]rinted by J[ohn] H[aviland] for William Lee […], paragraph 326, page 84

VVater, being contiguous vvith Aire, Cooleth it, but Moiſteneth it not, except it Vapour. The Cauſe is, for that Heat, and Cold haue a Virtuall Tranſition, vvithout Communication of Subſtance; but Moiſture not: […]

1631, Francis [Bacon], “IX. Century. [Experiment Solitary, Touching the Working of Water vpon Aire Contiguous.]”, in Sylua Syluarum: Or A Naturall Historie. In Ten Centuries. […], 3rd edition, London: […] William Rawley; [p]rinted by J[ohn] H[aviland] for William Lee […], paragraph 865, page 223