ROGET'S THESAURUS OF ENGLISH WORDS AND PHRASES ...

X-ray diffractometer, goniometer.
spectrometer, monochrometer, UV spectrometer, visible spectrometer, Infrared
spectrometer, Fourier transform infrared spectrometer, recording spectrometer;
densitometer, scanning densitometer, two-dimensional densitometer.
abdominoscope † , gastroscope [Med.], helioscope † , polariscope † , polemoscope † ,
spectroscope.
abdominoscopy † ; gastroscopy [Med.]; microscopy, microscopist.
446. Visibility -- N. visibility, perceptibility; conspicuousness, distinctness &c adj.;
conspicuity † , conspicuousness; appearance &c 448; bassetting † ; exposure; manifestation
&c 525; ocular proof, ocular evidence, ocular demonstration; field of view &c (vision)
441; periscopism † .
V. be become visible &c adj.; appear, open to the view; meet the eye, catch the eye;
basset; present itself, show manifest itself, produce itself, discover itself, reveal itself,
expose itself, betray itself; stand forth, stand out; materialize; show; arise; peep out, peer
out, crop out; start up, spring up, show up, turn up, crop up; glimmer, loom; glare; burst
forth; burst upon the view, burst upon the sight; heave in sight; come in sight, come into
view, come out, come forth, come forward; see the light of day; break through the clouds;
make its appearance, show its face, appear to one's eyes, come upon the stage, float
before the eyes, speak for itself &c (manifest) 525; attract the attention &c 457; reappear;
live in a glass house.
expose to view &c 525.
Adj. visible, perceptible, perceivable, discernible, apparent; in view, in full view, in
sight; exposed to view, en vidence; unclouded, unobscured † , in the foreground.
obvious &c (manifest) 525; plain, clear, distinct, definite; well defined, well marked;
in focus; recognizable, palpable, autoptical † ; glaring, staring, conspicuous; stereoscopic;
in bold, in strong relief.
periscopic † , panoramic.
before one's eyes, under one's eyes; before one, +a vue d'oeil [Fr.], in one's eye, oculis
subjecta fidelibus [Lat.].
Adv. visibly &c adj.; in sight of; before one's eyes &c adj.; veluti in speculum [Lat.].
447. Invisibility -- N. invisibility, invisibleness, nonappearance, imperceptibility;
indistinctness &c adj.; mystery, delitescence † .
concealment &c 528; latency &c 526.
V. be invisible &c adj.; be hidden &c (hide) 528; lurk &c (lie hidden) 526; escape notice.
render invisible &c adj.; conceal &c 528; put out of sight.
not see &c (be blind) 442; lose sight of.
Adj. invisible, imperceptible; undiscernible † , indiscernible; unapparent, non-apparent;
out of sight, not in sight; a perte de vue [Fr.]; behind the scenes, behind the curtain;
viewless, sightless; inconspicuous, unconspicuous † ; unseen &c (see) &c 441; covert &c
(latent) 526; eclipsed, under an eclipse.
dim &c (faint) 422; mysterious, dark, obscure, confused; indistinct, indistinguishable;
shadowy, indefinite, undefined; ill-defined, ill-marked; blurred, fuzzy, out of focus; misty
&c (opaque) 426; delitescent † .
hidden, obscured, covered, veiled (concealed) 528.