chalk

n. 粉筆、白堊

vt. 用粉筆寫、記錄

學術名詞

• 白堊：地質學、海洋科學、化學術語、肥料學、電機工程、礦冶工程
• 粉筆：輕工、電機工程、電力工程、機械工程、獸醫學
• 粉化：電機工程、電力工程
• 灰化：電機工程、電力工程
• 生石灰：化學術語
• 粉片：紡織科技
• 粉餅：紡織科技
• 天然堊：醫學

英文釋義

1. a soft whitish calcite
2. a pure flat white with little reflectance
3. an amphetamine derivative (trade name Methedrine) used in the form of a crystalline hydrochloride; used as a stimulant to the nervous system and as an appetite suppressant
4. a piece of calcite or a similar substance, usually in the shape of a crayon, that is used to write or draw on blackboards or other flat surfaces