dy
dy — abbreviation
1. a written short form of the word 'delivery', used on packages, shipping document
a written short form of the word 'delivery', used on packages, shipping documents, and order records to show that goods have been brought to a person or place.
The courier wrote 'dy' next to Ari's apartment number after handing over the parcel.
written abbreviation on shipping documents
Faisal checked the 'dy' column on the invoice before signing for the office supplies.
Each box in the warehouse has a red 'dy' stamp showing the date it arrived.
The tracking page showed 'dy' once the driver confirmed the handoff at the desk.
- delivered
the full adjective form used in order statuses
用法筆記
Appears on forms, labels, and digital tracking interfaces rather than in full sentences.
常見錯誤
2. a written short form of the word 'deputy', placed before an official job title t
a written short form of the word 'deputy', placed before an official job title to show that the person is the second-ranking officer below the main office holder.
Astrid was promoted to Dy Director of Operations after five years with the company.
Dy + job title for second-ranking officer
A letter signed by Dy Chairperson Eve arrived just before the annual board meeting.
Staff members should direct budget questions to the Dy Manager of the finance team.
The Dy Principal called a meeting to discuss changes to the school timetable.
用法筆記
Always followed by a capitalised job title (e.g. Dy Director, Dy Chair). More common in British English than American English organisational writing.
常見錯誤
3. a written short form of the word 'duty', used on customs forms and trade documen
a written short form of the word 'duty', used on customs forms and trade documents to refer to a government tax charged on goods brought into or taken out of a country.
The customs form showed 'dy paid' next to the shipment of ceramics from Japan.
'dy paid' on customs forms
Ayana reviewed the invoice and found the dy charges higher than expected.
Marta asked a customs agent whether the dy rate applied to her tiles from Portugal.
The port authority updated dy rates for textiles at the start of the quarter.
用法筆記
Almost always appears on printed forms and invoices rather than in spoken language. The full word 'duty' is preferred in speech.
常見錯誤
4. a written short form of the word 'dysprosium', a rare-earth element used in magn
a written short form of the word 'dysprosium', a rare-earth element used in magnets and laser materials.
The laboratory report listed 'dy' among the trace elements found in the rock sample.
abbreviation in lab reports
Mira noted the dy concentration in the alloy was too low for commercial use.
Kim checked the dy content on the certificate before approving the rare-earth ore shipment.
The shipment contained dy at ninety-nine percent purity, verified by an independent lab.
用法筆記
Used in technical writing and laboratory records. The standard periodic symbol Dy (capitalised) is more common in scientific formulas.
常見錯誤
dy — symbol
1. the two-letter chemical symbol for dysprosium, appearing in the periodic table a
the two-letter chemical symbol for dysprosium, appearing in the periodic table and in chemical formulas to represent this rare-earth lanthanide element.
In the periodic table, Dy sits between Tb, element 65, and Ho, element 67.
periodic table position for Dy
Heloísa wrote Dy in the formula to show the compound contained dysprosium.
Dy is a key ingredient in magnets for wind turbine rotors.
Dr. Okonkwo asked her students to find Dy among the lanthanide elements on the table.
用法筆記
Always capitalised as Dy in scientific writing. Distinguish from the lowercase abbreviation 'dy', which is used in non-scientific notes and records.
常見錯誤
dy — combining form
1. a Greek-derived prefix meaning 'two' or 'double', found in technical words such
a Greek-derived prefix meaning 'two' or 'double', found in technical words such as 'dyad' (a pair) and 'dyarchy' (rule by two).
In sociology class, Hoa studied the dyad as the smallest unit of social interaction.
dyad = a pair of two in social theory
Ancient Sparta was often described as a dyarchy with two kings ruling jointly.
dyarchy = government by two rulers
Professor Sato drew the Greek root 'dy-' on the board, showing how it forms 'dyad'.
Dr. Amira used dyadic analysis to study how pairs of musicians coordinate during a performance.
- mono-
prefix meaning 'one', from Greek
文法句型
dy- + noun
用法筆記
This combining form only appears within Greek-derived compounds and is not used as a standalone word. Unlike the English word 'two', dy- cannot be used independently — it always attaches to a root (e.g. dyad, not dy by itself).