The Chinese word for cotton ball is
棉花球

mián huā qiú

cotton ball

Chinese Definition

Components
棉
1. kapok (tree, fiber)
木棉 - kapok
2. cotton (tree, fiber)
樹棉 - Gossypium hirsutum (tree cotton)
棉衣 - cotton-padded clothing
3. cotton-like material
石棉 - asbestos
Mian
花
1. flower; blossom
花朵 - flower
2. florid; flowery
花花hua綠綠
3. pattern; design
花纹 - 花纹
4. blurred
眼花 - to have blurred vision
5. fireworks
煙花 - fireworks
6. essence; cream
7. wound
8. Short for 天花, gloss=smallpox
種zhòng花 - to vaccinate against smallpox
9. courtesan; prostitute
10. to spend (money, time, etc.); to cost
這件衣服花了不到一百塊 - This clothing cost less than 100 yuan.
11. profligate
12. (slang) randy; lecherous
13. (slang) to be horny; to womanize
儂又要去花儂個女朋友了是 ?？ - tr=3non&3hhieu+2iau+2qi+1ho+3non&5hheq+3nyy baan hhieu&0leq&3zr va, You're going to seduce your girlfriend again aren't you?, SH, ref=2007, 上海话大词典, page 52
14. false
15. (Cantonese) scratched
佢著着咗呢ni1 對鞋兩個月就已經花嗮喇。 - He's worn the shoes for only two months and they're already all scratched up.
16. (Cantonese, of images, drawings, patterns, etc.) over-colorful; chaotic; messy
17. (Cantonese, card games) flush
18. (Hong Kong) pip (insignia)
19. (Xiamen, &, Zhangzhou Hokkien) to extinguish; to put out (of fire)
20. (Quanzhou Hokkien) to disappear (of a scar)
21. (Shanghainese Wu) cotton
22. (Shanghainese Wu) to tease
儂覅來花我了，我根本覅儂搿本書。 - tr=3non&3viau&3le&1ho+3ngu&0leq&3ngu&1ken pen&3viau&3non&5geq pen&1sr, Stop teasing me, I didn't even want your book in the first place., SH, ref=2007, 上海话大词典, page
23. . Hua
球
1. ball; globe; orb
氣球 - balloon
雪球 - snowball
2. (mathematics) ball; solid sphere
3. earth
全球 - whole world
4. ball (in sports)
發球 - to serve
一個籃球 - a basketball
5. ball game
球迷 - fan of a ball sport
一場球 - a ball game
6. (Classifier for spherical objects.)
一球毛線 - a ball of knitting wool
7. (Teochew, Xiang) (Classifier for stringed objects.) string
8. (dialectal Mandarin, Jin, vulgar) (Expletive. Often used in the form of ……個球(…… my ass). Underlying meaning may be "testes".)
9. (Cantonese, colloquial) million dollars
10. (Singapore, slang) testicle
11. (medicine, attributive) bulbar
12. Variant of 璆