sentinel
noun · verbB1Định nghĩa theo từ loại
Danh từ
noun- 1.
A sentry, watch, or guard.
- 2.
(obsolete)A private soldier.
- 3.
(computer science) A unique value recognised by a computer program for processing in a special way, or marking the end of a set of data.
The <xmp> tag is a sentinel that suspends web-page processing and displays the subsequent text literally
- 4.
A sentinel crab.
- 5.
(attributive)(attributive, medicine, epidemiology) A sign of a health risk (e.g. a disease, an adverse effect).
sentinel animals can be used to explore endemic diseases.
Động từ
verb- 1.
(transitive)To watch over as a guard.
He sentineled the north wall.
- 2.
(transitive)To post a guard for.
He sentineled the north wall with just one man.
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Nguồn gốc từ
1570s from Middle French sentinelle (watch or guard kept by a soldier), from roa-oit sentinella, probably from sentina + --ella, from sentire (perceive, watch, hear), from sentiō (feel, perceive by the senses). See also sense, sentient.