having scruples; having or showing a strict regard for what one considers right; principled.
punctiliously or minutely careful, precise, or exact: a scrupulous performance.

1400–50; late Middle English < Latin scrūpulōsus. See scruple, -ous

scrupulosity [skroo-pyuh-los-i-tee] , scrupulousness, noun
scrupulously, adverb
hyperscrupulosity, noun
hyperscrupulous, adjective
hyperscrupulously, adverb
hyperscrupulousness, noun
underscrupulous, adjective
underscrupulously, adverb

1. conscientious, cautious, careful, circumspect. 2. exacting, rigorous. Scrupulous, punctilious imply abiding exactly by rules. Scrupulous implies conscientious carefulness in attending to details: scrupulous attention to details. Punctilious suggests strictness, preciseness, and rigidity, especially in observance of social conventions.

2. careless. Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
Cite This Source Link To scrupulous
World English Dictionary
scrupulous (ˈskruːpjʊləs)
1.  characterized by careful observation of what is morally right
2.  very careful or precise
[C15: from Latin scrūpulōsus punctilious]

Collins English Dictionary - Complete & Unabridged 10th Edition
2009 © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009
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Word Origin & History

late 15c., from Fr. scrupuleux (16c.) or directly from L. scrupulosus, from scrupulus (see scruple). Related: Scrupulously.
Online Etymology Dictionary, © 2010 Douglas Harper
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Example sentences
Scrupulous fossil collectors are careful always to get permission.
The subjects also read about scrupulous coffee drinkers and bookkeepers.
The city's sanitized vision turns to vapor and still less scrupulous dwellers
  take over again.
It has also been put together with scrupulous attention to the needs of the
  non-academic reader.
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