Published
Noun
しょさい
『古事記』所載の日本最古の和歌について何か知っていますか？
Do you know anything about the Japanese first waka published in the Kojiki?
The item is in a place in its existence where it is published. If something is in this place, it is printed and published.
This is a jukugo word, which usually means on'yomi readings from the kanji. If you know the readings of your kanji you'll know how to read this as well.