Meaning: Membranous structure that functions as the circulatory system in mammal embryos until the heart becomes functional. Classified under: Nouns denoting animals. Synonyms: umbilical vesicle; vesicula umbilicus; vitelline sac; yolk sac. Hypernyms (vesicula umbilicus is a kind of...): sac (a structure resembling a bag in an animal)
electric fan; blower. Hypernyms (blower is a kind of...): fan (a device for creating a current of air by movement of a surface or surfaces) Meronyms (parts of blower): electric motor (a motor that converts electricity to mechanical work) fan blade (blade of a rotating fan)
Checking centrifugal or positive displacement will separate search results into the two main blower types. Another few boxes can further refine the blower type, that is, picking rotary lobe, rotary vane, Roots, etc. will narrow the results to positive displacement machines of these specific types. There are some non-industrial blowers which can be selected here as well, leafblowers, for instance.