meniscus

• اسم يشير إلى بنية هلالية الشكل أو سطح منحنٍ، مثل الغضروف الهلالي الذي يخفف الاحتكاك في المفصل، أو العدسة ذات السطحين المحدب والمقعر، أو السطح العلوي المنحني لسائل في أنبوب ضيق.

A noun referring to a crescent-shaped structure or surface, such as a cartilage disk that cushions a joint, a lens with one concave and one convex side, or the curved upper surface of a liquid in a narrow tube.

جمع شاذ

1. Cartilage in a jointB2formalmedical

   A crescent-shaped piece of cartilage that acts as a cushion between the bones in a joint, such as the knee.

   غضروف هلالي

   • He tore his meniscus while playing soccer.
   • The surgeon repaired the damaged meniscus in her knee.
   • A healthy meniscus helps absorb shock during movement.

   المرادفاتsemilunar cartilage

2. Lens shapeC1formalscientific

   A lens that is concave on one side and convex on the other, used in optical instruments.

   عدسة هلالية

   • The microscope uses a meniscus lens to focus light.
   • Meniscus lenses are common in eyeglasses for certain prescriptions.
   • The optical system was designed with a meniscus element.

3. Liquid surfaceC1formalscientific

   The curved upper surface of a liquid in a narrow tube, caused by surface tension.

   سطح السائل

   • The meniscus of water in a glass tube is concave.
   • When reading a graduated cylinder, you should measure at the bottom of the meniscus.
   • Mercury forms a convex meniscus in a glass container.