hy·​dro·​pho·​bic | \ ˌhī-drə-ˈfō-bik How to pronounce hydrophobic (audio) \

Definition of hydrophobic

1 : of, relating to, or suffering from hydrophobia
2 : lacking affinity for water

Keep scrolling for more

Other Words from hydrophobic

hydrophobicity \ ˌhī-​drə-​fō-​ˈbi-​sə-​tē How to pronounce hydrophobicity (audio) \ noun

Examples of hydrophobic in a Sentence

Recent Examples on the Web

An undulating tail similar to the gecko's might help with the latter issue and strengthen forward propulsion, while coating the robot with a hydrophobic material similar to the gecko's skin structure could significantly reduce drag. Jennifer Ouellette, Ars Technica, "Geckos’ new superpower is running on water; now we know how they do it," 6 Dec. 2018 My dream toothbrush is coated in a nontoxic version of Rustoleum's Neverwet, the magically hydrophobic coating that makes water jump off surfaces. Rachel Z. Arndt, Popular Mechanics, "The Quest for the Best Electric Toothbrush," 13 Nov. 2017 The rubberized, two-position nosepiece made fit adjustments easy, and the hydrophobic temple pieces provided grip. Aaron Gulley, Outside Online, "8 New Riding Sunglasses for Summer," 13 June 2018 Ironically, light-moderate rain won’t penetrate a deep mulch volcano, and worse, fungal mycelium decomposing the mulch can create hydrophobic mats that repel water. Ellen Nibali, baltimoresun.com, "Garden Q&A: Mulch volcanoes are not what nature intended," 12 Apr. 2018 This PFC-Free eco-friendly treatment is applied in a patented process to create a super hydrophobic finish that never washes or wears off. Sami Emory, Outside Online, "Embrace the Rain," 27 Mar. 2018 Jackets have become surprisingly high-tech, using everything from hydrophobic polyester to next-gen synthetic down—but few jackets weave in actual tech used to fight the elements on other planets. Tim Newcomb, Popular Mechanics, "How NASA Tech Helps This Jacket Battle the Elements," 16 Mar. 2018 Some types of shower doors are available with a hydrophobic coating, a protector that repels water from the glass surface, preventing deposits from clinging to the smooth surface. Stacy Argo, Houston Chronicle, "GHBA Remodelers Council: Care for your glass shower doors, enclosures," 22 Feb. 2018 Kids were told the term for the sand is hydrophobic sand. Linda Gandee/special To Cleveland.com, cleveland.com, "The North Ridgeville library proves sandcastles aren't just for the beach anymore," 17 July 2017

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'hydrophobic.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

See More

First Known Use of hydrophobic

1807, in the meaning defined at sense 1

Keep scrolling for more

Learn More about hydrophobic

Statistics for hydrophobic

Look-up Popularity

Time Traveler for hydrophobic

The first known use of hydrophobic was in 1807

See more words from the same year

Keep scrolling for more

More Definitions for hydrophobic


hy·​dro·​pho·​bic | \ -ˈfō-bik How to pronounce hydrophobic (audio) \

Medical Definition of hydrophobic

1 : of, relating to, or suffering from hydrophobia
2 : resistant to or avoiding wetting a hydrophobic lens
3 : of, relating to, or having a lack of affinity for water hydrophobic colloids are relatively unstable — compare lyophobic, oleophobic

Other Words from hydrophobic

hydrophobically \ -​bi-​k(ə-​)lē How to pronounce hydrophobically (audio) \ adverb
hydrophobicity \ -​ˌfō-​ˈbis-​ət-​ē How to pronounce hydrophobicity (audio) \ noun, plural hydrophobicities

More from Merriam-Webster on hydrophobic

Rhyming Dictionary: Words that rhyme with hydrophobic

Comments on hydrophobic

What made you want to look up hydrophobic? Please tell us where you read or heard it (including the quote, if possible).


not to be persuaded, moved, or stopped

Get Word of the Day daily email!

Test Your Vocabulary

Words from Greek and Latin Quiz

  • roman forum
  • Which of the following months comes from a Latin word for “ten”?
How Strong Is Your Vocabulary?

Test your vocabulary with our 10-question quiz!


Test Your Knowledge - and learn some interesting things along the way.

Love words? Need even more definitions?

Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!