Piya

The Piya was a Chinese dictionary compiled by Song Dynasty scholar Lu Dian. He wrote this Erya supplement along with his Erya Xinyi commentary. Although the Piya preface written by his son Lu Zai is dated 1125, the dictionary was written earlier; estimates around the Yuanfeng era, and Joseph Needham says around 1096.
Lu Dian arranged the Piya into 8 semantically based chapters that closely correspond with the last Erya chapters 13–19. The only exceptions are Chapter 5 that is contained in Erya 19 and Chapter 8 that anomalously corresponds with the first part of the Erya.

Chapter	Chinese	Pinyin	Translation	Erya Chapter
1	釋魚	Shiyu	Explaining Fishes	16
2	釋獸	Shishou	Explaining Beasts	18
3	釋鳥	Shiniao	Explaining Birds	17
4	釋蟲	Shichong	Explaining Insects	15
5	釋馬	Shima	Explaining Horses
6	釋木	Shimu	Explaining Trees	14
7	釋草	Shicao	Explaining Plants	13
8	釋天	Shitian	Explaining Heaven	8

The preface explains Lu's motives for defining flora and fauna terminology. Since Song officials changed the basis for the Imperial examination from mastering poetry to jingyi, literati no longer studied the lyrical names for plants and animals.