underfur
Definition
Noun: 1. The dense, soft layer of fur beneath the longer, coarser outer hairs of a mammal: Underfur is the thick, woolly, and often water-resistant hair that grows closest to an animal's skin. Its primary function is insulation, trapping air to keep the animal warm.
Usage
Underfur is a specific zoological term. It is typically used when discussing animal biology, adaptations, or the properties of fur in species like otters, beavers, seals, and many other mammals with a dual-layer coat. It is an uncountable noun.
Examples
- The underfur of a sea otter is so dense that it prevents water from reaching the animal's skin.
- Trappers valued beaver pelts primarily for the soft, thick underfur used in making felt hats.
- During winter, many mammals develop a thicker layer of underfur for added warmth.
Advanced Usage
- In scientific description: The term is used to contrast the two main types of mammalian hair: the protective and the insulating .
- The study focused on the insulating properties of the arctic fox's underfur compared to its guard hairs.
Variants and Related Words
- Undercoat (noun): A common synonym for underfur, especially when referring to domestic animals like dogs.
- Guard hair (noun): The longer, stiffer outer layer of hair that protects the underfur from moisture and wear.
Synonyms
- Undercoat
- Down
- Ground hair
Antonyms
- Guard hair
- Outer coat
Noun
-
thick soft fur lying beneath the longer and coarser guard hair
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