lên hoa
Definition
- Verb phrase:
- To effloresce / to bloom with a powdery coating: In chemistry, "lên hoa" describes the process where certain crystalline salts lose their water of crystallization when exposed to air, forming a powdery coating on their surface. This is a scientific term for efflorescence.
- To flower / to bloom (archaic or poetic): In rare, older, or literary usage, it can be interpreted literally as "to come up into flower" or "to bloom."
Usage Examples
- Verb phrase (Scientific):
- Một số muối vô cơ để ngoài không khí sẽ lên hoa. (Some inorganic salts will effloresce when left in the air.)
- Hiện tượng lên hoa làm thay đổi bề mặt của vật liệu. (The phenomenon of efflorescence changes the material's surface.)
Advanced Usage
- "Sự lên hoa": (Noun) Efflorescence. Refers to the process or the resulting powdery deposit itself.
- Sự lên hoa của vữa xi măng có thể gây mất thẩm mỹ. (The efflorescence of cement mortar can cause aesthetic loss.)
Variants and Related Words
- Nở hoa (v): This is the common, standard phrase meaning "to bloom" or "to flower" (for plants).
- Cây đào đã nở hoa. (The peach tree has bloomed.)
Synonyms
- Effloresce: (Scientific) To turn to a powder by losing water of crystallization.
- Bloom: (General) To produce flowers; (Scientific, less common) a powdery surface deposit.
Notes on Usage
- "Lên hoa" is a highly specialized term in modern Vietnamese. Its primary and almost exclusive use is in scientific contexts (chemistry, construction, material science) to describe efflorescence.
- For the everyday concept of a plant producing flowers, "nở hoa" is always used. Using "lên hoa" to mean "bloom" would sound archaic or incorrect to most contemporary speakers.
- The dictionary reference to "effleurir" (French for "to skim" or "to touch lightly") appears to be a partial cognate or a specific technical translation for the chemical process.