weigh

v. measure the heaviness of (an object, proposition, etc.); consider; be of a particular heaviness; burden; be significant in influencing a decision; lift an anchor

Whey or milk plasma is the liquid remaining after milk has been curdled and strained; it is a by-product of the manufacture of cheese or casein and has several commercial uses.
See more at Wikipedia.org...

(v. t.)
To pay, allot, take, or give by weight.
  

(v. t.)
To examine or test as if by the balance; to ponder in the mind; to consider or examine for the purpose of forming an opinion or coming to a conclusion; to estimate deliberately and maturely; to balance.
  

(v. t.)
To examine by the balance; to ascertain the weight of, that is, the force with which a thing tends to the center of the earth; to determine the heaviness, or quantity of matter of; as, to weigh sugar; to weigh gold.
  

(v. t.)
To consider as worthy of notice; to regard.
  

(v. t.)
To bear up; to raise; to lift into the air; to swing up; as, to weigh anchor.
  

(v. t.)
To be equivalent to in weight; to counterbalance; to have the heaviness of.
  

(v. i.)
To judge; to estimate.
  

(v. i.)
To have weight; to be heavy.
  

(v. i.)
To bear heavily; to press hard.
  

(v. i.)
To be considered as important; to have weight in the intellectual balance.
  

(n.)
A corruption of Way, used only in the phrase under weigh.
  

(n.)
A certain quantity estimated by weight; an English measure of weight. See Wey.
  

Verb
1. have a certain weight
(hypernym) measure
(verb-group) librate
2. show consideration for; take into account; "You must consider her age"; "The judge considered the offender's youth and was lenient"
(synonym) consider, count
(hyponym) consult
(derivation) deliberation, weighing, advisement
3. determine the weight of; "The butcher weighed the chicken"
(synonym) librate
(hypernym) quantify, measure
(hyponym) heft
(derivation) weigher
4. have weight; have import, carry weight; "It does not matter much"
(synonym) count, matter
(hypernym) be
(hyponym) press
5. to be oppressive or burdensome; "weigh heavily on the mind", "Something pressed on his mind"
(synonym) press
(hypernym) count, matter