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ligand

American  
[lahy-guhnd, lig-uhnd] / ˈlaɪ gənd, ˈlɪg ənd /

noun

  1. Biochemistry. a molecule, as an antibody, hormone, or drug, that binds to a receptor.

  2. Chemistry. a molecule, ion, or atom that is bonded to the central metal atom of a coordination compound.


ligand British  
/ ˈlɪɡənd, ˈlaɪ- /

noun

  1. chem an atom, molecule, radical, or ion forming a complex with a central atom

"Collins English Dictionary — Complete & Unabridged" 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Etymology

Origin of ligand

1945–50; < Latin ligandus, gerund of ligāre to bind, tie

Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

See Examples For:

This arrangement created an octacoordinate ligand environment, giving the scientists a way to fine-tune the positions of the metals.

From Science Daily Jul. 29, 2026

By examining evolutionary relationships between uracil sensors and related sensory domains, the team found that ligand specificity can change relatively easily over time.

From Science Daily Feb. 8, 2026

"I'm excited to see the ligand design pay off in such a meaningful way," said Wedal.

From Science Daily Feb. 3, 2026

The key is the ligand — that’s the general word for whatever chemical messenger or signaling molecule attaches to the receptor, activating it.

From Salon Jan. 24, 2025

The ligand or tag must be inert and have no negative impact on the function of the cells or create any reaction that could cause side effects.

From Science Daily Nov. 25, 2024

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