Thanks & Giving

compass  | ˈkəmpəs | noun 1  ( also   magnetic compass ) an instrument containing  a   magnetized   pointer  that   shows   the   direction   of   magnetic north   and   bearings (orientations)  from it . The   use   of   the   compass   for   navigation   at sea   was  reported   from   China   c. 1100, western   Europe 1187,   Arabia   c. 1220, and   Scandinavia   c. 1300,  although   it   probably   dates   from   much earlier. Since   the   early   20 th   century   the   magnetic compass   has been   superseded   by   the  gyrocompass   as   primary   equipment   for ships and aircraft .

from Thesaurus CHOOSE   THE RIGHT   WORD rapture, bliss,  ecstasy , euphoria, transport Happiness is one thing;  bliss   is another, suggesting a state of utter joy and contentment ( marital bliss ).  Ecstasy   is even more extreme, describing a trancelike state in which one loses  consciousness   of  one's surroundings ( the ecstasy of young love ). Although  rapture  originally referred  to  being raised or lifted out of oneself by divine power, nowadays it is used in much the same sense as  ecstasy  to describe an elevated sensation of bliss ( she listened in speechless rapture to her favorite soprano ).  Transport  (usually in the plural form  transports ) applies to any powerful emotion by which one is carried away ( transports of joy ). When happiness is carried to an extreme or crosses over into mania, it is called  euphoria .  Euphoria  may outwardly resemble  ecstasy  or  rapture ; but upon closer examination, it is usually found to be exaggerated and out of proportion (

Any time two different genes contribute to a single phenotype and their effects are not merely additive, those genes are said to be epistatic. (ref:  http://www.nature.com/scitable/topicpage/epistasis-gene-interaction-and-phenotype-effects-460) In  classical genetics , if genes A and B are mutated, and each mutation by itself produces a unique phenotype but the two mutations together show the same phenotype as the gene A mutation, then gene A is epistatic and gene B is  hypostatic .  (ref: http://en.wikipedia.org/wiki/Epistasis)