dorsal

IPA/ˈdɔːsl/
KK[dˈɔrsəl]IPA/ˈdɔːrsl/

dorsal — adjective

  • dorsalpositive
  • more dorsalcomparative
  • most dorsalsuperlative

1. found on or describing the upper side of an animal's body — the part that contai

1.adjectiveB2
Definition

found on or describing the upper side of an animal's body — the part that contains the backbone and is opposite the belly

Example

A dolphin uses its dorsal fin to stay steady while swimming fast.

collocation: dorsal fin

Nora felt a small lump on the dorsal surface of her hand after the fall.

Common collocations
  • dorsal fin
  • dorsal surface
  • dorsal side
  • dorsal area
  • dorsal muscle
  • dorsal spine
Synonyms
  • back

    less formal, everyday term; 'back fin' is simpler but less precise than 'dorsal fin'

  • spinal

    refers specifically to the spine area, not the whole back side; 'spinal column' vs 'dorsal region'

  • posterior

    used mainly in human anatomy for the rear side; less common for animals

Antonyms
  • ventral

    the exact opposite — relating to the belly or front side

Grammar Patterns

dorsal + noun

Usage Note

Attributive use (before a noun) is most common: dorsal fin, dorsal surface, dorsal area. The opposite of dorsal is ventral (relating to the belly side).

Common Mistakes

The doctor checked her dorsal.
The doctor checked her dorsal area.
dorsal is an adjective, not a noun. Use it before a noun like 'dorsal surface' or 'dorsal area'.

2. in biology and medicine, describing the side or surface of a part that faces awa

2.adjectiveC1
Definition

in biology and medicine, describing the side or surface of a part that faces away from the central line of the body or organ — for example, the top of the foot or the lower surface of a leaf

Example

Hyun drew the dorsal side of the leaf in his botany notebook.

botany: dorsal side of a leaf

The doctor pressed gently on the dorsal area of Ramón's foot.

Common collocations
  • dorsal side (of a leaf)
  • dorsal lip
  • dorsal surface (of an organ)
  • dorsal area (of the foot)
Synonyms
  • abaxial

    a technical synonym used mainly in botany for the side of a leaf away from the stem

Antonyms
  • ventral

    facing toward the axis — the opposite orientation

  • adaxial

    the botany-specific opposite, meaning the side facing the stem

Grammar Patterns

dorsal + noun

Usage Note

This sense is chiefly used in technical biology and medical contexts. It contrasts with ventral (facing toward the axis) and is commonly applied to organs, limbs, leaves, and embryos.

Common Mistakes

The dorsal part of the leaf is the top.
The dorsal part of the leaf is the side facing away from the stem.
In botany dorsal means away from the stem axis, which is usually the lower surface.

Word family

Synonym discussion

Sense: adjective/1

Dorsal is the standard formal term in biology and medicine for the back side of an animal or the upper surface. Back is the everyday word — you would say "a sore back" not "dorsal pain" — but it is not a direct replacement since it is a noun, not an adjective. Spinal refers specifically to the spine and its structures (spinal cord, spinal column) and covers a narrower area than dorsal. Posterior is used mainly in human anatomy for the rear side of the body; it is not applied to animals. For example, a doctor describes a "dorsal hand wound" (top of hand), not a "posterior hand wound". Choose dorsal when you need a precise anatomical adjective; use back for general description.

dorsal ↗back ↗spinal ↗posterior

Common collocations

Nouns

  • dorsal fin
  • dorsal surface
  • dorsal side
  • dorsal area
  • dorsal muscle
  • dorsal spine
  • dorsal lip

Adverbs

  • dorsally located
  • dorsally positioned

Phrases

  • dorsal and ventral

Prepositions

  • on the dorsal side
  • along the dorsal area

Etymology

LatinLate LatinEnglish

Dorsal comes directly from the Latin word dorsum, meaning 'back'. It entered English through Late Latin dorsalis during the 15th century and has been used in anatomy and biology ever since as the formal adjective for the back side of a body.

First known use

1727

1727, in the meaning defined at sense 1 Noun (2)