Definition of "focal" []

• Of or relating to a focus. (adjective)
• Placed at or measured from a focus. (adjective)

American Heritage(R) Dictionary of the English Language, Fifth Edition. Copyright (c) 2011 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

• "“Dortmunder,” Tiny said, ponderously thoughtful, “is what you call your focal point.”"
• "And this reservoir became what you call your focal point of protest."
• "This type of HI is caused by a defective SUR1 or KIR6. 2 gene in focal cells of the pancreas only."