underfur

1. The pelt or fur ( especially the underfur) of a seal.
   海豹的毛皮（尤指下层绒毛）。
2. Eared seal of the S hemisphere; the thick soft underfur is the source of sealskin.
   产于南半球的海狗；软而密的下层绒毛是海豹皮的原料。
3. Coarse hairs that form the outer fur and protect the underfur of certain mammals.
   某些哺乳动物用来保护下层绒毛的由粗糙的毛组成的外皮。
4. Mole of southern Africa having iridescent guard hairs mixed with the underfur.
   非洲南部的鼹鼠，细软的绒毛中混杂有彩虹般的保护性毛发。
5. Pinniped mammal having external ear flaps and hind limbs used for locomotion on land; valued for its soft underfur.
   鳍足动物，有外耳廓，后肢用于在陆地上行走；以其柔软的下层绒毛而名贵。
6. The Identification of Sheep Wool and Cashmere Underfur
   绵羊毛与山羊绒的鉴别

noun

1. thick soft fur lying beneath the longer and coarser guard hair

   Synonym:    undercoat