Definition

1. Noun:
   • Down (feathers): The soft, fine, and fluffy layer of feathers found on young birds, especially chicks and nestlings, beneath their tougher outer feathers. It provides insulation.
   • Lanugo: The fine, soft hair that covers the body of a human fetus or newborn baby.

Usage Examples

• Noun:
  • Những chú vịt con vàng ươm với bộ lông măng xù rất đáng yêu. (The bright yellow ducklings with their fluffy down are very cute.)
  • Trẻ sơ sinh thường có một lớp lông măng mềm mại trên da. (Newborn babies often have a soft layer of lanugo on their skin.)

Advanced Usage

• The term is primarily used in biological, zoological, or medical contexts to describe this specific type of immature covering.
• It can be used metaphorically in literature to describe something extremely soft and delicate.

Variants and Related Words

• Lông vũ (n): feather, plume (the mature, structured feather of a bird).
• Lông tơ (n): This is a more common and general term for fine, soft hair or fuzz, applicable to both plants (like peach fuzz) and animals. It is often used interchangeably with for baby hair.

Synonyms

• Down: soft feathers.
• Lanugo: fine fetal hair.
• Fuzz: a covering of fine soft fibers.

Related Idioms

• : (Soft as down) - An idiom used to describe something extremely soft and delicate to the touch.