阴平声 (陰平聲) yīnpíngshēng

yīnpíngshēng noun first tone; high level tone
Domain: Linguistics 语言学 , Subdomain: Phonetics , Concept: Tone 声调
Notes: The first tone in modern standard Chinese pronunciation, which is constant in intensity and longer in duration than the second and fourth tones. It is [55] in Chao's notation (Norman 1988, pp. 145-148).