The Collaborative International Dictionary
Sederunt \Se*de"runt\, n. [L., they sat, fr. sedere to sit.] A sitting, as of a court or other body.
'T is pity we have not Burns's own account of that long
sederunt.
--Prof.
Wilson.
Acts of sederunt (Scots Law), ordinances of the Court of
Session for the ordering of processes and expediting of
justice.
--Bell.
Douglas Harper's Etymology Dictionary
"sitting, session," Latin, literally "they sat" (typical opening word in recordings of such proceedings), third person plural past tense of sedere "to sit" (see sedentary).
Wiktionary
n. 1 (context Scotland English) A formal meeting, especially of a judicial or ecclesiastical body. 2 (context Scotland English) Those people present at such a meeting.
Wikipedia
Usage examples of "sederunt".
But it is my balsamic advice, that rather than promulgate this matter, the two malcontents should abdicate, and that a precept should be placarded at this sederunt as if they were not here, but had resigned and evaded their places, precursive to the meeting.
Mr Peevie, one of the very sickerest of all the former sederunts, came to me next morning, in a remonstrating disposition, to enquire what had come over me, and to tell me that every body was much surprised, and many thought it not right of me to break in upon ancient and wonted customs in such a sudden and unconcerted manner.
So it came about that when Mr Lammas had passed his trials and won his licence to preach, a special sederunt of the Free Fishers took place, and he was duly appointed their chaplain, with whatever rights, perquisites and privileges might inhere in that dignity.