Free

tire in the sidewalk
Free
1. enjoying personal rights or liberty, as a person who is not in slavery: a land of free people.
2. pertaining to or reserved for those who enjoy personal liberty: They were thankful to be living on free soil.
3. existing under, characterized by, or possessing civil and political liberties that are, as a rule, constitutionally guaranteed by representative government: the free nations of the world.
4. enjoying political autonomy, as a people or country not under foreign rule; independent.
5. exempt from external authority, interference, restriction, etc., as a person or one’s will, thought, choice, action, etc.; independent; unrestricted.
6. able to do something at will; at liberty: free to choose.
7. clear of obstructions or obstacles, as a road or corridor: The highway is now free of fallen rock.
8. not occupied or in use: I’ll try to phone her again if the line is free.
9. exempt or released from something specified that controls, restrains, burdens, etc. (usually followed by from or of ): free from worry; free of taxes.
10. having immunity or being safe (usually followed by from ): free from danger.
11. provided without, or not subject to, a charge or payment: free parking; a free sample.
Dictionary.com
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Sphygmomanometer


The word comes from the Greek sphygmós (pulse), plus the scientific term manometer (pressure meter). The device was invented by Samuel Siegfried Karl Ritter von Basch in 1881. Scipione Riva-Rocci introduced a more easily used version in 1896. In 1901, Harvey Cushing modernized the device and popularized it within the medical community.–Wikipedia