| 释义 |
prim·er
I. \ˈprimə(r) also chiefly Brit ˈprīm-\ noun
(-s)
Etymology: Middle English, from Medieval Latin primarium, from neuter of primarius basic, primary, from Late Latin — more at primary
1. : a layman's prayer book of the 14th to 17th centuries containing miscellaneous prayers, psalms, and offices originally written or printed in Latin but later mainly in English and used also in teaching children to read
2.
a. : a small elementary book for teaching children to read
< a primer for the first grade >
b. : a usually small introductory book on a specific subject
< a primer of modern art >
< a primer of chemistry >
3. : something that gives or is a means of giving elementary instruction or training
< his year as a precinct worker served as his primer of politics >
II. adjective
Etymology: Middle English, from Middle French, from Late Latin primarius
obsolete : primary
III. \ˈprīmə(r)\ noun
(-s)
Etymology: prime (IV) + -er
1. : an instrument or device for priming: as
a. : a contrivance (as a cap, tube, or wafer containing percussion powder or other compound) used to ignite an explosive charge and itself ignited by friction, percussion, or electricity
b. : a small copper cup containing a charge of some shock-sensitive high explosive (as mercury fulminate) that initiates the propelling charge in a firearm when ignited (as in a percussion cap) by a blow from the hammer or (as in a modern cartridge or shot-shell case) by impact of the firing pin
2. : priming
3.
a. : one who applies priming (as of paint or varnish)
b. : a worker who gathers the prime leaves from tobacco plants
4. : a plasmagene that acts as a priming device for various reactions
IV. noun
: a molecule (as a short strand of RNA or DNA) whose presence is required for formation of another molecule (as a longer chain of DNA) |