Term: clack valve: a simple valve with a hinge on one side; allows fluid to flow in only one direction
Candidate hypernym: valve: control consisting of a mechanical device for controlling the flow of a fluid → 1
Candidate hypernym: product research: marketing research that yields information about desired characteristics of the product or service → 0
Candidate hypernym: wartime: a period of time during which there is armed conflict → 0
Candidate hypernym: cerebral vein: any of several veins serving the cerebral hemispheres of the brain → 0
Candidate hypernym: topicality: the attribute of being of interest at the present time → 0
Candidate hypernym: erythronium: perennial bulbous herbs most of northern United States: dogtooth violet; adder's tongue; trout lily; fawn lily → 0
Candidate hypernym: addition reaction: a chemical reaction in which one molecule is added to another → 0
Candidate hypernym: metonym: a word that denotes one thing but refers to a related thing → 0
Candidate hypernym: psychodidae: very small two-winged flies with hairy wings that develop in moss and damp vegetable matter: sand flies → 0
Candidate hypernym: crash dive: a rapid descent by a submarine → 0
Candidate hypernym: oculopharyngeal muscular dystrophy: a form of muscular dystrophy that usually begins between early adulthood and middle age and first affects muscles of the eyelid and throat; progresses slowly with swallowing problems common as the disease progresses; inheritance is autosomal dominant → 0