Word Meanings - APERTURE - Book Publishers vocabulary database

The diameter of the exposed part of the object glass of a telescope or other optical instrument; as, a telescope of four-inch aperture. Note: The aperture of microscopes is often expressed in degrees, called also the angular aperture,

Additional info about word: APERTURE

The diameter of the exposed part of the object glass of a telescope or other optical instrument; as, a telescope of four-inch aperture. Note: The aperture of microscopes is often expressed in degrees, called also the angular aperture, which signifies the angular breadth of the pencil of light which the instrument transmits from the object or point viewed; as, a microscope of 100º aperture. (more info) 1. The act of opening. 2. An opening; an open space; a gap, cleft, or chasm; a passage perforated; a hole; as, an aperture in a wall. An aperture between the mountains. Gilpin. The back aperture of the nostrils. Owen.

Possible synonyms: (Same meaning words of APERTURE)

• Opening
• Aperture
• gap
• opportunity
• space
• commencement
• initiation
• start
• inauguration
• hole
• fissure
• chink
• beginning
• Orifice
• perforation
• mouth
• opening
• bung
• bunghole

Related words: (words related to APERTURE)

• OPENNESS
  The quality or state of being open.
• FISSURE
  A narrow opening, made by the parting of any substance; a cleft; as, the fissure of a rock. Cerebral fissures , the furrows or clefts by which the surface of the cerebrum is divided; esp., the furrows first formed by the infolding of the whole
• STARTLINGLY
  In a startling manner.
• APERTURE
  The diameter of the exposed part of the object glass of a telescope or other optical instrument; as, a telescope of four-inch aperture. Note: The aperture of microscopes is often expressed in degrees, called also the angular aperture,
• OPEN SEA
  A sea open to all nations. See Mare clausum.
• SPACE
  One of the intervals, or open places, between the lines of the staff. Absolute space, Euclidian space, etc. See under Absolute, Euclidian, etc. -- Space line , a thin piece of metal used by printers to open the lines of type to a regular distance
• STARTFULNESS
  Aptness to start.
• MOUTHFUL
  1. As much as is usually put into the mouth at one time. 2. Hence, a small quantity.
• CHINK
  A small cleft, rent, or fissure, of greater length than breadth; a gap or crack; as, the chinks of wall. Through one cloudless chink, in a black, stormy sky. Shines out the dewy morning star. Macaulay.
• STARTISH
  Apt to start; skittish; shy; -- said especially of a horse.
• INAUGURATION
  1. The act of inuagurating, or inducting into office with solemnity; investiture by appropriate ceremonies. At his regal inauguration, his old father resigned the kingdom to him. Sir T. Browne. 2. The formal beginning or initiation of any movement,
• OPEN
  1. Free of access; not shut up; not closed; affording unobstructed ingress or egress; not impeding or preventing passage; not locked up or covered over; -- applied to passageways; as, an open door, window, road, etc.; also, to inclosed structures
• OPEN-MOUTHED
  Having the mouth open; gaping; hence, greedy; clamorous. L'Estrange.
• INITIATION
  1. The act of initiating, or the process of being initiated or introduced; as, initiation into a society, into business, literature, etc. "The initiation of coursers of events." Pope. 2. The form or ceremony by which a person is introduced into
• MOUTHED
  1. Furnished with a mouth. 2. Having a mouth of a particular kind; using the mouth, speech, or voice in a particular way; -- used only in composition; as, wide- mouthed; hard-mouthed; foul-mouthed; mealy-mouthed.
• PERFORATION
  1. The act of perforating, or of boring or piercing through. Bacon. 2. A hole made by boring or piercing; an aperture. "Slender perforations." Sir T. Browne.
• MOUTH
  An opening affording entrance or exit; orifice; aperture; as: The opening of a vessel by which it is filled or emptied, charged or discharged; as, the mouth of a jar or pitcher; the mouth of the lacteal vessels, etc. The opening or entrance of any
• BEGINNING
  1. The act of doing that which begins anything; commencement of an action, state, or space of time; entrance into being or upon a course; the first act, effort, or state of a succession of acts or states. In the beginning God created the heaven
• OPENLY
  1. In an open manner; publicly; not in private; without secrecy. How grossly and openly do many of us contradict the precepts of the gospel by our ungodliness! Tillotson. 2. Without reserve or disguise; plainly; evidently. My love . . . shall show
• COMMENCEMENT
  1. The first existence of anything; act or fact of commencing; rise; origin; beginnig; start. The time of Henry VII . . . nearly coincides with the commencement of what is termed "modern history." 2. The day when degrees are conferred by colleges
• PROPENE
  See PROPYLENE
• PROPENSE
  Leaning toward, in a moral sense; inclined; disposed; prone; as, women propense to holiness. Hooker. -- Pro*pense"ly, adv. -- Pro*pense"ness, n.
• LOUD-MOUTHED
  Having a loud voice; talking or sounding noisily; noisily impudent.
• REDMOUTH
  Any one of several species of marine food fishes of the genus Diabasis, or Hæmulon, of the Southern United States, having the inside of the mouth bright red. Called also flannelmouth, and grunt.
• SPLAYMOUTH
  A wide mouth; a mouth stretched in derision. Dryden.
• FLAP-MOUTHED
  Having broad, hangling lips. Shak.
• HOT-MOUTHED
  Headstrong. That hot-mouthed beast that bears against the curb. Dryden.
• FOUL-MOUTHED
  Using language scurrilous, opprobrious, obscene, or profane; abusive. So foul-mouthed a witness never appeared in any cause. Addison.
• REDSTART
  A small, handsome European singing bird , allied to the nightingale; -- called also redtail, brantail, fireflirt, firetail. The black redstart is P.tithys. The name is also applied to several other species of Ruticilla amnd allied genera, native
• FROGMOUTH
  One of several species of Asiatic and East Indian birds of the genus Batrachostomus ; -- so called from their very broad, flat bills.
• SCOLOPENDRINE
  Like or pertaining to the Scolopendra.