King's Kung-Fu& Tai Chi

Chinese symbol for “quadratic”

二阶
èr jiē
Traditional: 二階
second order; quadratic (math.)

The closest CC-CEDICT match for quadratic is 二阶 (èr jiē), defined as: second order; quadratic (math.).

Before using these characters for a tattoo, check them with a native speaker. Dictionary words often have several meanings, and the right choice depends on context.

Characters and stroke order

二 èr
two; twice
radical 7 ⼆ · 2 strokes
阶 jiē
stairs, steps; degree, rank
radical 170 ⾩ · 6 strokes

Traditional forms

Other Chinese words for “quadratic”

WordPinyinMeaning
二次èr cìsecond (i.e. number two); second time

Related words

Other words that share a character with 二阶.

WordPinyinMeaning
第二dì èrsecond; number two
第二次dì èr cìthe second time; the second occurrence
第二天dì èr tiānnext day; the morrow
二级 (二級)èr jígrade 2; second class
十二shí èrtwelve; 12
二十èr shítwenty; 20
阶段 (階段)jiē duànstage; section
阶级 (階級)jiē jí(social) class; 个 (gè)

See also: Japanese symbol for “quadratic”.

Data: CC-CEDICT (CC BY-SA 4.0); Unihan Database (Unicode License v3); Make Me a Hanzi (Arphic Public License (graphics.txt); LGPL-3.0-or-later (dictionary.txt)); wordfreq (CC BY-SA 4.0 (data)). Retrieved 2026-10-22.