Douglas Harper's Etymology Dictionary
Usage examples of "soroptimist".
She went to a Soroptimist meeting at which she introduced the speaker and acted as chairman.
She had invited the speaker and a couple of Soroptimist members to tea, a ceremony from which the Colonel and Giles had opted out, and she did not see either of the men again until she got back from her meeting.
That, she thinks, was at about half-past ten, because, when the meeting was over, the Soroptimists threw a sherry party.