Definition

Noun: 1. (Biology) The state or condition of lacking correspondence between apparently similar body parts or organs, typically in different species, due to differences in fundamental structure, origin, or development.

Usage

This is a specialized biological term. It is used to describe a specific type of anatomical difference where structures may appear superficially similar but are fundamentally dissimilar in their essential nature or embryonic origin.

Examples

• The heterology between the wing of a bat and the wing of an insect is evident despite their similar function in flight; one is a modified vertebrate limb, the other is an outgrowth of the exoskeleton.
• Comparative anatomy studies often focus on distinguishing between homology (shared ancestry) and heterology (different ancestry) in structural features.
• The concept of heterology helps explain why analogous structures, like the fins of a shark and a dolphin, are not considered homologous.

Advanced Usage

• The term is primarily used in formal, academic, or scientific writing within the fields of evolutionary biology, comparative anatomy, and zoology.
• It is often discussed in contrast to homology (correspondence due to common ancestry) and analogy (similarity in function but not origin).

Variants and Related Words

• Heterologous (adjective): Of the nature of heterology; not corresponding in structure or origin.
  • The scientist studied the heterologous tissues from different species.

Synonyms

• Dissimilarity (in fundamental structure)
• Non-correspondence
• Disparity (in a biological context)

Antonyms

• Homology
• Correspondence
• Similarity (in origin and structure)

Noun

1. (biology) the lack of correspondence of apparently similar body parts