- A botfly of the family Oestridae.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
Examples from the Web for oestrid
To the family Oestrid belong the bot and warble-flies so frequently injurious to animals.
There are on record many cases of the occurrence of the larv of Oestrid as occasional parasites of man.