dorsum

Thân thiện

A doctor points to the dorsum of a patient's hand during an examination.

Definition

1. Noun:
   • The back of the body of a vertebrate or any analogous surface: In anatomy, "dorsum" refers to the back or upper surface of an organism or a bodily part. For example, it can describe the back of a human or animal, or the top surface of an organ, appendage, or structure like the foot or hand.
   • The posterior part of a human (or animal) body from the neck to the end of the spine: This meaning specifies the entire dorsal aspect of the torso.

Usage Examples

• Noun:
  • The patient had a rash on the dorsum of her hand. (The rash was on the top/back surface of her hand.)
  • In insects, the dorsum is often protected by a hard exoskeleton. (This refers to the upper surface or "back" of the insect's body segment.)
  • The muscles of the human dorsum are complex and support the spine. (This refers to the muscles of the back.)

Advanced Usage

• Anatomical Terminology: "Dorsum" is a formal term used primarily in scientific, medical, and zoological contexts to describe positional anatomy. It is the opposite of "ventrum" (the front or belly side).
  • The dorsal fin of a shark is located on its dorsum. (The fin is on the shark's back.)
• In Entomology: Refers specifically to the upper surface of an insect's thorax or abdomen.
  • The distinctive markings on the beetle's dorsum help with identification.

Variants and Related Words

• Dorsal (adj): Pertaining to the back or upper side. This is the most common related adjective.
  • The dorsal side of the leaf is typically darker.
• Dorsum is itself a specialized noun; common compound terms like "dorsum of the tongue" or "dorsum of the nose" use it to specify a particular anatomical part.

Synonyms

• Back: The most common general synonym for the body part.
• Upper surface: A descriptive synonym when referring to analogous parts like the hand or foot.

Related Phrases (Not Phrasal Verbs)

• Dorsal side: The side corresponding to the back or upper surface.
  • The dorsal side of the forearm faces posteriorly.
• Dorsal aspect: A formal way to refer to the back-facing view or surface.
  • The MRI showed a lesion on the dorsal aspect of the spinal cord.

Related Idioms

• There are no common idioms using the word "dorsum" due to its highly technical nature. In everyday language, "back" is used instead.

Học thuật

Noun

1. the back of the body of a vertebrate or any analogous surface (as the upper or outer surface of an organ or appendage or part)
   • the dorsum of the foot
2. the posterior part of a human (or animal) body from the neck to the end of the spine
   • his back was nicely tanned

Từ đồng nghĩa

• back