1. Any of four small muscles in the palm of the hand that flex the fingers at the knuckles and extend them at the joints.
Usage: anatomy; usually used in plural form 'lumbricals'
2. Any of four small muscles in the sole of the foot with similar flexing and extending functions.
Usage: anatomy; usually used in plural form 'lumbricals'

1. Of or relating to the lumbrical muscles.
Usage: anatomy

Examples

• The lumbricals are essential for fine motor control of the fingers.
• Damage to the lumbricals can impair hand dexterity.
• The anatomy instructor pointed out the lumbrical muscles on the skeletal model.
• Pianists develop strong lumbricals through years of practice.
• The foot's lumbricals help with balance and toe movement.