cyclopean masonry
— Noun
– English
~ a primitive style of masonry characterized by use of massive stones of irregular shape and size
critical mass
— Noun
– English
~ the minimum amount (of something) required to start or maintain a venture; "the battle for the computer market has now reached critical mass"; "there is now a critical mass of successful women to take the lead"; "they sold the business because it lacked critical mass"
critical mass
— Noun
– English
~ the minimum mass of fissionable material that can sustain a chain reaction
cardiac massage
— Noun
– English
~ an emergency procedure that employs rhythmic compression of the heart (either through the chest wall or, during surgery, directly to the heart) in an attempt to maintain circulation during cardiac arrest