capitulum (plural capitula) may refer to:

• the Latin word for chapter
  • an index or list of chapters at the head of a gospel manuscript
  • a short reading in the Liturgy of the Hours
    • derived from which, it is the Latin for the assembly known as a chapter
  • a typographic symbol (⸿), to mark chapters or paragraphs, now evolved into the pilcrow

• Capitulum (flower), a type of flower head composed of numerous tiny florets, characteristic of the family Asteraceae
• Capitulum (moss), the top of a Sphagnum moss plant with compact clusters of young branches; also the apothecium (fruiting body) of lichens of the order Calicium

• the capitulum of the humerus in vertebrates
• the gnathosoma of ticks and mites
• in stalked barnacles, the armoured portion within which the appendages and most of the viscera are located
• Capitulum (genus), a genus of goose barnacles
• a part of the female Lepidoptera genitalia
• a structure similar to an elaiosome, found on the eggs of some species of stick insects