|a screen or mat covered with a dark material for shielding a camera lens from excess light or glare.|
|a chattering or flighty, light-headed person.|
mammary artery n.
The internal thoracic artery or the lateral thoracic artery.
thoracic artery n.
The internal mammary artery, with origin in the subclavian artery and bifurcations to the musculophrenic and superior epigastric arteries; internal thoracic artery.
The external mammary artery, with origin in the axillary artery and distribution to the muscles of the chest and mammary gland; lateral thoracic artery.
An artery with origin in the axillary artery, with distribution to the muscles of the chest, and with anastomoses to the branches of the suprascapular, internal thoracic, and thoracoacromial arteries; superior thoracic artery.