As adjectives the difference between rosy and rosaceous

is that rosy is rose-coloured while rosaceous is of or pertaining to a rose, or a member of the rosaceae family of plants or rosaceous can be resembling or characteristic of rosacea; rosy; reddish.

As a noun rosy

is (slang|british) tea.

As adjectives the difference between reddish and rosaceous

is that reddish is somewhat red while rosaceous is of or pertaining to a rose, or a member of the rosaceae family of plants or rosaceous can be resembling or characteristic of rosacea; rosy; reddish.

As a noun yolk

is the yellow, spherical part of an egg that is surrounded by the white albumen, and serves as nutriment for the growing young.

As an adjective vitelline is

of, pertaining to, or resembling the yolk of an egg.

As a noun egg

is (zoology|countable) an approximately spherical or ellipsoidal body produced by birds, snakes, insects and other animals, housing the embryo during its development.

As a verb egg

is to throw eggs at or egg can be to encourage, incite.

As an adjective vitelline is

of, pertaining to, or resembling the yolk of an egg.

Derogate is a synonym of vilipend.

As verbs the difference between derogate and vilipend

is that derogate is (obsolete|transitive) to partially repeal (a law etc) while vilipend is to despise.

As an adjective derogate

is (archaic) debased.

Misprize is a synonym of vilipend.

As verbs the difference between misprize and vilipend

is that misprize is to despise or hold in contempt; to undervalue while vilipend is to despise.

As a noun misprize

is (obsolete|rare) contempt.

As a noun positive

is .

As an adjective seropositive is

.

As a noun pathogen

is (pathology|immunology) any organism or substance, especially a microorganism, capable of causing disease, such as bacteria, viruses, protozoa or fungi microorganisms are not considered to be pathogenic until they have reached a population size that is large enough to cause disease.

As an adjective seropositive is

.

As a noun hiv

is hiv.

As an adjective seropositive is

.

Seronegative is an antonym of seropositive.

As adjectives the difference between seronegative and seropositive

is that seronegative is while seropositive is .