uniparous

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

• adjective Producing only one egg or offspring at a time.
• adjective Having produced only one offspring; primiparous.

from The Century Dictionary.

• Producing one at a birth: as, uniparous animals. In botany, having but one axis or branch: as, a uniparous cyme.

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

• adjective (Zoöl.) Producing but one egg or young at a time.
• adjective (Bot.) Producing but one axis of inflorescence; -- said of the scorpioid cyme.

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

• adjective zoology Producing a single egg or offspring at one time
• adjective botany Having a cluster of flowers that form a single axis at each branching

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

• adjective producing only one offspring at a time