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But the requisite definition is found in the Oxford Dictionaries Online: 3 (Of a quantity or dimension) stated or expressed but not necessarily corresponding exactly to the real value: 'EU legislation allowed variation around the nominal weight (that printed on each packet)' This usage in engineering long predates the space program.
In civil engineering, the words invert and obvert are used in the context of pipe elevations. I gather that invert means: interior bottom elevation of pipe, and obvert means: interior top elevation of pipe. However, using the word invert in this context seems strange to me. To me, none of these definitions fit:
In writing for non-technical people (C-suite, Board of Directors etc.), is it more likely this audience would understand redundancy to mean additional components to take over for failed components or
OED 1, 10, says. in Machinery.The part of a shaft or axle which rests on the bearings. (Sometimes erroneously identified with ‘bearing’.)
In engineering and science, these tend to have fairly technical meanings. That is, a pseudopod is something that looks like a foot but is not, semiannually means twice a year (and I can't really think of an accepted repeatable term that begins with 'quasi'). In mathematics, however, all bets are off.
One can have had plenty of experience but if nothing has been learned as a result, one would not be considered seasoned. See Cambridge Dictionary for this definition . . . 'having a lot of experience of doing something and therefore knowing how to do it well'
Not that the NOAD is an ultimate authority, but I found it interesting that eng. could be used to abbreviate both engineer and engineering, yet engr. lists engineer but not engineering: eng. abbreviation • engine. • engineer. • engineering. • engraved. • engraver. • engraving. engr. abbreviation • engineer. • engraved. • engraver.
Just a note: This is a correct definition for engineering systems, but does not apply more broadly to a general English definition. – Lynn Commented Jan 7, 2012 at 23:00
There is a paper that addresses this exact question, titled appropriately enough "Dilation vs. Dilatation: A Brief History" (Journal of Urology 1992: Vol. 147, 1682; Bloom, Mory and Hinman) which appears to conclude that there is no difference.
To use it in a software engineering setting would be to borrow from another field of engineering. Using NASA-talk in a humdrum office is a bit jocular, even pretentious. It's like using military jargon: 'roger; copy that; affirmative'