subingression en · NOUN
Etymology
From sub- + ingression.
Meanings
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(obsolete, uncountable) The act of ingressing or entering subtly or unobservedly.
[T]vvo very volatile Liquors, vvhich being gently put together are as clear as Rock-vvater, and yet vvill almoſt in a moment, vvithout the ſub-ingreſſion of Air to turn them into Bubbles, ſo alter the diſpoſition of their inſenſible parts, as to become a vvhite and conſiſtent Body.
1659 December 30 (date written), Robert Boyle, “[Experiment 37]”, in New Experiments Physico-Mechanicall, Touching the Spring of the Air, and Its Effects […], Oxford, Oxfordshire: […] H[enry] Hall, printer to the University, for Tho[mas] Robinson, published 1660, →OCLC, pages 312–313: