《埤雅》，是北宋的陸佃所編輯的辭典，總共20卷，主要展現陸佃對於《詩經》中的動植物深入的研究。

陸佃死後，其子陸宰在北宋宣和7年（1125年）為此書寫序。

同樣以動植物作為分類的書籍，南宋的羅願所編撰的《爾雅翼》。

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The Piya (埤雅 Píyǎ|w=P'i-ya; "Increased Erya") was a Chinese dictionary compiled by Song Dynasty scholar Lu Dian (陸佃/陆佃, 1042-1102). He wrote this Erya supplement along with his Erya Xinyi (爾雅新義 "New Exegesis of the Erya") commentary. Although the Piya preface written by his son Lu Zai (陸宰/陆宰) is dated 1125, the dictionary was written earlier; estimates around the Yuanfeng era (元豐, 1078–1085), 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 ("Explaining Horses") that is contained in Erya 19 ("Explaining Domestic Animals") and Chapter 8 ("Explaining Heaven") that anomalously corresponds with the first part of the Erya.

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 (經義/经义 "expounding on a classical quotation"), literati no longer studied the lyrical names for plants and animals.