What does strobila mean?
Strobila is a specialized biological noun with two main uses. In the life cycle of many true jellyfish, it refers to the stacked series of immature ephyrae produced when a polyp-like stage undergoes transverse division in a process called strobilation. The immature animals eventually detach and continue developing as free-swimming medusae. In zoology, the term can also describe a larval or embryonic stage in some annelids, during which the body develops a sequence of segments. A rarer botanical sense treats strobila as a synonym for strobilus, the familiar cone-like reproductive structure of conifers. Strobila is not everyday vocabulary, but it captures a striking biological transformation: a single jellyfish polyp can produce an orderly column of young medusae, each of which separates from the stack.
nounIn zoology, a strobila is the stacked series of immature jellyfish, or ephyrae, produced when a polyp undergoes transverse division. In botany, the less common term is a synonym for a strobilus, a cone-like reproductive structure.
- The stacked series of immature ephyrae formed when a scyphistoma, or polyp stage, undergoes transverse division in the life cycle of many scyphozoan jellyfish.
- A larval or embryonic stage in some annelids in which serial body segments develop.
- A rare botanical synonym for a strobilus, especially the cone-like reproductive structure of conifers.
"The mature polyp underwent strobilation and released a strobila of young ephyrae into the water."
"The scyphistoma transformed into a strobila, with each developing segment eventually separating as an ephyra."
"The annelid passed through a strobila stage in which its body became divided into successive segments."
The standard plural of strobila is strobilae, following the Latin plural commonly used in biological terminology.
"Several strobilae were released from the polyps during the breeding season."
In some jellyfish, a single polyp becomes a tower of tiny future jellies—a process called strobilation.
Reviewed by Deb Chak, Editor. AI-assisted content curated by RJS Tech Solutions LLP.
Etymology of strobila
The word comes through Modern Latin strobila, with the plural strobilae, from Greek strobilos, meaning “pine cone.” The Greek root is associated with strephein, “to turn,” probably referring to the arrangement of scales in a cone. Scientific usage extended the word to segmented reproductive and developmental structures before establishing the less common botanical sense.
Related word forms
How strobila is actually used
This is primarily specialist biological vocabulary. Its zoological sense is uncommon outside research on cnidarians and annelids; the botanical sense is rare and largely displaced by the more familiar term strobilus.
Easily confused with strobila
Strobilus is the standard botanical term for a cone-like reproductive structure, whereas strobila most often denotes a stage in a jellyfish's life cycle and is only a rare botanical synonym.