monotocous

from The Century Dictionary.

• In zoology, having only one at a birth; uniparous, as the human species usually is; laying but one egg before incubating, as sundry birds.
• In botany, bearing progeny (fruiting) only once, as in annuals or biennials: same as monocarpous. Also monotokous.

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

• adjective (Bot.) Bearing fruit but once; monocarpic.
• adjective (Zoöl.) Uniparous; laying a single egg.

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

• adjective botany Bearing fruit only once; monocarpic.
• adjective zoology Laying a single egg; uniparous.