dia

IPA/dˈaɪə/
KK[dˈiə]IPA/dˈiːə/

dia — 縮寫

1. a shortened written form of diameter, used in labels, measurements, and technica

1.縮寫B1
釋義

直徑

量尺或圖表裡代表直徑

a shortened written form of diameter, used in labels, measurements, and technical notes to show how wide a round object is from one side to the other through its center

例句

The diagram labels the outer ring as 18 cm dia.

圖上把外圈標成直徑 18 公分，記作 dia。

dia after a number in a diagram label

Rania ordered a 25 mm dia pipe for the bathroom repair.

Rania 為浴室維修訂了一支直徑 25 毫米的管子。

同義詞
  • diameter

    the full word used in ordinary speech and general writing

  • diam.

    another written shortening seen in technical documents

文法句型

18 cm dia

25 mm dia pipe

hole dia

用法筆記

Used mainly in written measurements, tables, and diagrams, especially after a number. In ordinary sentences and speech, people usually say or write the full word diameter instead.

常見錯誤

❌The wheel is twenty dia.
✅The wheel has a diameter of twenty centimeters.
💡dia is a written abbreviation, not the usual full word in a normal sentence.

2. the shortened name of the Defense Intelligence Agency, a United States military

2.縮寫C1
釋義

國防情報局

美國軍事情報機關的縮寫

the shortened name of the Defense Intelligence Agency, a United States military organization that collects and studies foreign security information

例句

The newspaper said the DIA sent a warning to Congress.

報紙說國防情報局已向國會送出警告。

the DIA as the subject of a news report

A reporter quoted a DIA officer during the briefing on missile tests.

一名記者在飛彈測試簡報期間引用了一位 DIA 官員的說法。

DIA + officer

同義詞

文法句型

the DIA

DIA report

DIA officer

用法筆記

Written in capitals because it names one specific US agency. Distinguish from sense 1 and sense 3 by context: this sense appears in military, intelligence, or government reporting, not in measurements or medical notes.

常見錯誤

❌The dia released a statement.
✅The DIA released a statement.
💡this agency name is normally written in capitals.

3. a shortened written form of diathermy, used in clinic schedules or treatment not

3.縮寫C2
釋義

透熱療法

醫療筆記中代表透熱療法

a shortened written form of diathermy, used in clinic schedules or treatment notes for heat-based medical therapy

例句

The therapist wrote dia next to Tuesday's heat treatment.

治療師在週二的透熱療法旁寫上 dia。

dia in a treatment schedule

In the clinic notes, dia was scheduled after the shoulder massage.

在門診筆記裡，dia 被排在肩部按摩之後，表示接著做透熱療法。

同義詞

文法句型

dia on the treatment chart

schedule dia after massage

cross out dia in the notes

用法筆記

This shorthand appears mainly in specialist medical writing where the treatment list is brief. In normal speech and patient-facing writing, the full word diathermy is much more likely.

常見錯誤

❌The doctor gave me dia yesterday.
✅The doctor gave me diathermy yesterday.
💡dia is mainly a note-taking abbreviation, not the usual full word in a sentence.