fertile

from The American Heritage® Dictionary of the English Language, 5th Edition.

• adjective Capable of initiating, sustaining, or supporting reproduction.
• adjective Capable of growing and developing; able to mature.
• adjective Botany Bearing functional reproductive structures such as seeds or fruit or material such as spores or pollen.
• adjective Bearing or producing crops or vegetation abundantly; fruitful.
• adjective Rich in material needed to sustain plant growth.
• adjective Highly or continuously productive; prolific.
• adjective Physics Capable of producing fissionable material.

from The Century Dictionary.

• Bearing or producing abundantly, as of vegetable growth, and sometimes of offspring; productive; fruitful: with of or in before the thing produced: as,fertile soil; a fertile breed of animals; a land fertile of wheat, or fertile in soldiers as well as supplies.
• Productive mentally; fruitful in intellectual activity; inventive; ingenious: as, a fertile brain or imagination; a mind fertile in resources.
• In bot.:
• Fruiting, or capable of producing fruit; having a perfect pistil: as, a fertile flower.
• Capable of fertilizing, as an anther with well-developed pollen.
• Causing production; fertilizing; promoting fecundity: as, fertile showers; fertile thoughts; a fertile suggestion.
• In bee-keeping, in a fertilized state; pregnant. See the extract.
• Synonyms Productive, etc. See fruitful.

from the GNU version of the Collaborative International Dictionary of English.

• adjective Producing fruit or vegetation in abundance; fruitful; able to produce abundantly; prolific; fecund; productive; rich; inventive
• adjective Capable of producing fruit; fruit-bearing.
• adjective Containing pollen; -- said of anthers.
• adjective produced in abundance; plenteous; ample.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

• adjective of land, etc. capable of growing abundant crops; productive
• adjective biology capable of reproducing; fecund, fruitful
• adjective biology capable of developing past the egg stage
• adjective of an imagination, etc. productive or prolific

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

• adjective bearing in abundance especially offspring
• adjective intellectually productive
• adjective marked by great fruitfulness
• adjective capable of reproducing