oak apple
- noun
- Specialized
:
manzana de roble
- The oak apple is a round gall that can usually be spotted on the trunk of an oak tree.
- oak apple gall
Examples
-
I often find oak apples hanging from the branches of oak trees in the park.
-
Look at that oak apple!
-
An oak apple can often be seen hanging from the branches of English oak trees in early summer.
-
Historically, ink was sometimes made from crushed oak apples mixed with iron salts.
-
She pulled a small, spongy oak apple from the tree to show her students.
-
I found a small oak apple on the ground.
-
George ran to an oak tree and picked up an oak apple.
Surface Forms
Morphology
oak + apple
The compound 'oak apple' transparently signals a round object associated with an oak (oak + apple suggests an apple‑shaped growth on an oak), so a B1 learner who knows the constituents can infer it's some round thing on an oak tree. However, the specific biological sense — a gall caused by gall‑wasp larvae — is not derivable from the parts, making the expression only partially predictable and not fully transparent.
Etymology
Oak apple comes from a simple picture: a round growth on an oak tree that looks like a small apple. The growth is actually a 'gall' made by a tiny 'wasp', so the name describes that apple-like growth.
