Definition of "dimerous" []

• Consisting of two parts or segments, as the tarsus in certain insects. (adjective)
• Botany Having flower parts, such as petals, sepals, and stamens, in sets of two. (adjective)

American Heritage(R) Dictionary of the English Language, Fifth Edition. Copyright (c) 2011 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

• "Again, it may be remarked that many of these orders show a tendency towards a regular diminution of the assumed normal number of their parts; thus, among _Onagraceæ_, _Circeia_ and _Lopezia_ may be referred to, the former normally dimerous, the latter having only one perfect petal."
• "So in fuchsias, a very common deviation consists in a trimerous and rarely a dimerous symmetry of the flower."
• "Regular dimerous flower of _Calanthe vestita_ 402 199."