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Explanation: I wouldn't use "foster mother" at all. This will just get a lot of tittering.
The University of Glasgow :: Newsletter :: Issue 255 - PeopleTwo years later he was offered the principalship at Glasgow and came back to what he later came to consider his Alma Mater. Facing him was the need to ... www.gla.ac.uk:443/newsletter/details.cfm?id=2367&issue=255&... - 11k - Cached - Similar pages
University of Glasgow :: Press Release :: Adam Smith Research ...Adam Smith (1723 - 1790) entered Glasgow University at the age of fourteen. ... that he found Oxford a far inferior pedagogic institution to his alma mater. ... www.gla.ac.uk:443/pressreleases/stories.cfm?PRID=3991 - 7k - Cached - Similar pages
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Explanation: This is how I often render it. But though diplomas are monotonously similar in phraseology from institution to institution, other renderings will be called for depending upon the immediate context. I have seen diplomas where 'nourishing' was a viable translation; elsewhere 'patroness' seemed better.
Joseph Brazauskas United States Specializes in field Native speaker of: English, Spanish PRO pts in category: 58