to key out
- phrasal verb
- Jargon
- We spent the afternoon keying out insects under the supervision of our biology professor.
Examples
-
The students were able to key out the plant species using the field guide.
-
I will key out the plant species.
-
She carefully keyed out the mushroom to ensure it was safe to eat.
-
Can you key out this animal for me?
-
In the field, we spent hours keying out the various plants we encountered along the trail.
-
The students learned how to key out different species of birds using a dichotomous key.
-
Using the guidebook, she was able to easily key out the plants in her garden.
Synonyms
Say who someone is or what something is
Notice a sound or sight among other things
To identify a plant or animal using steps in a guide
Surface Forms
Morphology
The overall meaning is based on the verb 'key' (to identify using a systematic key) plus a particle sense of completion or making identification explicit, so a learner who knows the specialized verb sense could infer the phrase. However, 'key' as a verb is technical and rare and the contribution of 'out' here is somewhat idiomatic/particle-like rather than a fully regular compositional pattern, so the sense is not completely transparent to a general B1 learner.
Etymology
The verb key out comes from the idea of a key, a simple guide with choices you follow step by step, and out meaning 'reach the answer'. When you key out a plant or insect you follow the choices until you reach the name, so key out means 'to identify' the species.