the GNU version of the Collaborative International Dictionary of English
adj. Fruitful in children; prolific.
The Century Dictionary and Cyclopedia
Prolific; readily producing offspring; hence, fruitful or productive in a general sense: as, the fecund earth.
WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
adj. capable of producing offspring or vegetation
adj. intellectually productive
Word Usage
"When those selected Tweets can then be cross-referenced with other sets of data from outside Twitter - that's when the word fecund starts feeling inadequate."