commercial-grade
— Adjective
– English
～ of the kind or quality used in commerce; average or inferior; "commercial grade of beef"; "commercial oxalic acid"
concentration gradient
— Noun
– English
～ a gradient in concentration of a solute as a function of distance through a solution; "the movement of a solute down its concentration gradient is called diffusion"
coronary artery bypass graft
— Noun
– English
～ open-heart surgery in which the rib cage is opened and a section of a blood vessel is grafted from the aorta to the coronary artery to bypass the blocked section of the coronary artery and improve the blood supply to the heart
corneal graft
— Noun
– English
～ a surgical procedure in which part or all of a damaged or diseased cornea is replaced by healthy corneal tissue from a donor
coarse-grained
— Adjective
– English
～ not having a fine texture; "coarse-grained wood"; "large-grained sand"
close-grained
— Adjective
– English
～ dense or compact in structure or texture, as a wood composed of small-diameter cells; "close-grained birch"; "fine-grained rock"