filter paper
noun
: porous unsized paper used especially for filtering
Example Sentences
Recent Examples on the Web But the lab tests for newborn screenings generally don't use all of the half-dozen or so drops of blood collected on filter paper cards. 
Michelle Andrews, CBS News, 13 Sep. 2022 While still in the hospital, a child's heel is pricked within a day or two of birth and small spots of blood are collected on a filter paper card. jsonline.com, 29 Apr. 2022 In 1963, Guthrie pioneered a simple test for detecting the genetic disorder phenylketonuria, commonly called PKU, using just a few drops of blood collected from a baby's heel and placed on filter paper. Mark Johnson, jsonline.com, 29 Apr. 2022 Working with her husband, who was also a chemist, Ms. Free figured out how to impregnate strips of filter paper with chemicals that turned blue when glucose was present. New York Times, 3 May 2021 Georgia Nester, a researcher from Curtin University in Perth, Australia, filtered over 2,000 liters of water onto filter papers. Devi Lockwood, New York Times, 14 Apr. 2020 Typically, researchers use pipettes to apply microliters of the protein solution to sample holders and blot away the excess with filter paper. Eric Hand, Science | AAAS, 23 Jan. 2020 The room had shelves filled with glass jars of kissing bugs crawling on filter paper folded accordion style. Marc Burckhardt, National Geographic, 17 June 2019 After filling open-ended tea bags made of conventional filter paper, students will add a string to the bag and then iron the opening closed. Ginger Brashinger, Daily Southtown, 27 June 2018 See More
Michelle Andrews, CBS News, 13 Sep. 2022 While still in the hospital, a child's heel is pricked within a day or two of birth and small spots of blood are collected on a filter paper card. jsonline.com, 29 Apr. 2022 In 1963, Guthrie pioneered a simple test for detecting the genetic disorder phenylketonuria, commonly called PKU, using just a few drops of blood collected from a baby's heel and placed on filter paper. Mark Johnson, jsonline.com, 29 Apr. 2022 Working with her husband, who was also a chemist, Ms. Free figured out how to impregnate strips of filter paper with chemicals that turned blue when glucose was present. New York Times, 3 May 2021 Georgia Nester, a researcher from Curtin University in Perth, Australia, filtered over 2,000 liters of water onto filter papers. Devi Lockwood, New York Times, 14 Apr. 2020 Typically, researchers use pipettes to apply microliters of the protein solution to sample holders and blot away the excess with filter paper. Eric Hand, Science | AAAS, 23 Jan. 2020 The room had shelves filled with glass jars of kissing bugs crawling on filter paper folded accordion style. Marc Burckhardt, National Geographic, 17 June 2019 After filling open-ended tea bags made of conventional filter paper, students will add a string to the bag and then iron the opening closed. Ginger Brashinger, Daily Southtown, 27 June 2018 See More Word History
First Known Use
1670, in the meaning defined above
Medical Definition
filter paper
noun
-ˌpā-pər 
: porous unsized paper used especially for filtering