specula
specula — noun
1. the plural form of speculum; medical tools used to gently hold open the ear, nos
the plural form of speculum; medical tools used to gently hold open the ear, nose, vaginal canal, or other body cavities so that a doctor can see or treat the inner area.
The doctor arranged the specula by size on a clean metal tray before the examinations.
plural noun; used with 'arranged by size'
Modern disposable specula have reduced the risk of infection in busy clinics.
collocation: disposable specula
The nurse handed two sterile specula to the physician before the procedure began.
Different specula are designed for examining the ear, nose, and other body openings.
用法筆記
Specula is the plural form; the singular is speculum. Frequently appears with adjectives describing material or size: 'disposable specula', 'sterile specula', 'pediatric specula'.
常見錯誤
2. mirrors or highly polished metal surfaces used inside optical instruments such a
mirrors or highly polished metal surfaces used inside optical instruments such as telescopes and microscopes to reflect and direct light.
The telescope's main specula are polished to a perfect curve for clear night-sky images.
collocation: main specula; polished to a perfect curve
Precision specula are essential for directing laser beams inside laboratory equipment.
Minh cleaned the antique brass specula carefully, restoring their original shine.
Camille adjusted the specula inside the microscope to bring the sample into focus.
用法筆記
In modern optics, 'mirror' is far more common than specula for everyday instruments. Specula in this sense is largely restricted to technical descriptions of historical or precision instruments.
常見錯誤
3. diagrams or tables showing the positions of every planet in the sky at a particu
diagrams or tables showing the positions of every planet in the sky at a particular moment, used by astrologers to draw up birth charts or make predictions.
The astrologer drew detailed specula showing the planets at the client's moment of birth.
verb collocation: drew specula
Ancient Babylonian specula mapped the night sky across the changing seasons.
Tomás compared two specula from different dates to see how the planets had moved.
Hand-drawn specula from the 1600s are now kept in rare-book collections.
- birth chart
a specific type of specula drawn for the moment of a person's birth; more common in modern astrology
- horoscope
often used interchangeably but more broadly refers to a prediction based on the chart, not the chart itself
- celestial map
a broader term for any astronomical chart of stars and planets, not limited to astrology
4. clearly defined areas of bright color on the secondary wing feathers of some bir
clearly defined areas of bright color on the secondary wing feathers of some birds, especially ducks, often used to identify the species from a distance.
Mallards' bright blue specula are easy to spot when the birds fly past a pond.
collocation: bright blue specula (duck species)
Quinn identified the duck species by the green specula bordered with white on its wings.
Birdwatchers use the color and shape of the specula to tell similar duck species apart.
The male teal flashes iridescent green specula during its short display flight.
- wing patch
a more general term for any colored area on a bird's wing, not specific to secondary feathers
- speculum
the singular form, more commonly used by birdwatchers when describing one bird
用法筆記
In ornithology the singular speculum is far more common than the plural specula, since each bird has one speculum per wing. Use the singular when describing an individual bird.