| 也 | yě | also; too; as well; (not ...) either / (used after a verbal or nominal expression X to indicate that X is an extreme or unexpected case) even (X) / (literary) particle having functions similar to 啊[a5] |
| 叉 | chā | fork / pitchfork / prong / pick / cross / intersect / "X" |
| 耗时 | hào shí | time-consuming / to take a period of (x amount of time) |
| 相提并论 | xiāng tí bìng lùn | to discuss two disparate things together (idiom); to mention on equal terms / to place on a par with / (often with negatives: impossible to mention X in the same breath as Y) |
| 情愿 | qíng yuàn | willingness / would rather (agree to X than Y) |
| 增收 | zēng shōu | to increase revenue / to increase income by (x amount) / to levy (a surcharge, tax increase etc) / (of a school) to have an increased student intake |
| 片子 | piān zi | film / movie / film reel / phonograph record / X-ray image |
| X光 | X guāng | X-ray |
| 探伤 | tàn shāng | to inspect metal for flaws (using X-ray or ultrasound etc) |
| 透视 | tòu shì | (drawing and painting) perspective / (medicine) to perform fluoroscopy; to examine by X-ray / (fig.) to take a penetrating look at sth; to gain insight |
| 双曲余割 | shuāng qū yú gē | hyperbolic cosecant, i.e. function cosech(x) |
| 可结合性 | kě jié hé xìng | associativity (xy)z = x(yz) (math.) |
| 伦琴射线 | lún qín shè xiàn | X-ray / Röntgen or Roentgen ray |
| 同日而语 | tóng rì ér yǔ | lit. to speak of two things on the same day (idiom); to mention things on equal terms (often with negatives: you can't mention X at the same time as Y) |
| ○ | líng | character used in Taiwan as a substitute for a real name (like "X" in English) / variant of 〇[ling2] |
| 癸 | guǐ | tenth of the ten Heavenly Stems 十天干[shi2 tian1 gan1] / tenth in order / letter "J" or Roman "X" in list "A, B, C", or "I, II, III" etc / ancient Chinese compass point: 15° / deca |
| 龛影 | kān yǐng | (radiography) the shadow of a peptic ulcer in a barium-swallow X-ray |
| 克西 | kè xī | xi (Greek letter Ξ, ξ) |
| 极轴 | jí zhóu | polar axis (x-axis in polar coordinates) |
| 余集 | yú jí | complement of a set S (math.) / the set of all x not in set S |
| 截距 | jié jù | intercept (the point at which a line crosses the x- or y-axis) |
| 新新人类 | xīn xīn rén lèi | new generation of youths (generation X, Y etc) |
| 结合律 | jié hé lǜ | associative law (xy)z = x(yz) (math.) |
| 普朗克常数 | Pǔ lǎng kè cháng shù | (physics) Planck's constant h, approximately 6.626 x 10⁻³⁴ joule.seconds |
| 二次方 | èr cì fāng | square (i.e. x times x) |