The song is a trisyllabic " oop-oop-oop ", which gives rise to its English and scientific names.
12.
The effects of open-syllable lengthening and trisyllabic laxing often led to differences in the stem vowel between singular and plural / genitive.
13.
I think it's an example of trisyllabic laxing .-- talk ) 08 : 24, 30 September 2016 ( UTC)
14.
Its calls are described as a deep, trisyllabic " tu-hoo-hoo ", which is seemingly the territorial song emitted before breeding.
15.
In some cases, trisyllabic laxing appears to take place when it shouldn't, for example, in " south " vs . " southern ".
16.
When approaching a female during courtship, the male will let out a trisyllabic " cu-coo-cu " while bowing to his mate.
17.
In such cases, the apparent anomaly is due to later sound changes; e . g . " southern " was pronounced at the time that trisyllabic laxing applied.
18.
The call is typically a trisyllabic " oop-oop-oop ", which may give rise to its English and scientific names, although two and four syllables are also common.
19.
As a result of these changes, the pairs of vowels related by trisyllabic laxing often bear little resemblance to each other in Modern English; however, originally they always bore a consistent relationship.
20.
This article uses the word'GeoWall'as a convenient trisyllabic equivalent for " "'low-cost polarization-based dual-projector interactive 3D stereoscopic system "'".
