shoal

Từ điển Oxford Advanced Learner 8th

shoal [shoal shoals shoaled shoaling] BrE [ʃəʊl] NAmE [ʃoʊl] noun
1. a large number of fish swimming together as a group
•shoals of herring
•Squid travel in shoals.
compare ↑school (⁹)
2. a small hill of sand just below the surface of the sea
•The boat ran aground on a shoal.

Word Origin:
sense 1 late 16th cent. Middle Dutch schōle ‘troop’ ↑schoolsense 2 Old English sceald Germanic ↑shallow

Example Bank:
•a large shoal of herring

• Từ đồng nghĩa / Synonyms:
  school, shallow