Definition

1. Noun:
   • An upper chamber of the heart: "atrium cordis" refers specifically to one of the two upper chambers in the heart that receive blood from the veins and pump it into the ventricles. The term is Latin in origin, directly translating to "atrium of the heart."

Usage

• The term "atrium cordis" is a precise anatomical term. In modern English medical and biological contexts, it is more common to use the simplified term "atrium" (plural: atria). "Atrium cordis" is used for formal specificity.
• It is typically used as a singular noun. The plural form is "atria cordis."

Examples

• Noun:
  • The deoxygenated blood enters the atrium cordis on the right side.
  • An echocardiogram showed an abnormality in the left atrium cordis.

Advanced Usage

• "Atrium cordis dextrum": the right atrium of the heart.
  • The superior vena cava drains into the atrium cordis dextrum.
• "Atrium cordis sinistrum": the left atrium of the heart.
  • Oxygenated blood from the lungs returns to the atrium cordis sinistrum.

Variants and Related Words

• Atrium (n): the common English term for "atrium cordis."
  • The right atrium receives blood from the body.
• Atrial (adj): relating to an atrium.
  • Atrial fibrillation is a common heart rhythm disorder.
• Auricle (n): a term sometimes used synonymously with atrium, though it can also refer to a small, ear-shaped appendage of the atrium.

Synonyms

• Atrium: the primary synonym in modern English.
• Auricle: a less precise synonym, often used in older texts or specific contexts.

Notes

• "Atrium cordis" is a compound noun where "cordis" is the genitive (possessive) form of "cor," meaning "heart." Therefore, it literally means "atrium of the heart." This distinguishes it from other types of atria (e.g., in architecture).
• There are no common idioms or phrasal verbs associated with this specific technical term.

Noun

1. the upper chamber of each half of the heart