A surname from German.

(set theory) A diagram which represents a finite poset, in which nodes are elements of the poset and arrows represent the order relation between elements. Transitivity of the order relation is tacit, in other words, if x<y and y<z then no arrow is drawn from x to z, but if there is no distinct z between x and y (such that x<z<y) then an arrow is draw from x to y.

plural of Hasse diagram

plural of Hass avocado

A cultivar of avocado with dark-green bumpy skin that turns purplish-black when ripe.

(chemistry) An equation describing the derivation of pH as a measure of acidity (using pKa, the negative log of the acid dissociation constant) in biological and chemical systems.

A dish of potatoes sliced very thin, but with the bottoms left intact, and then baked and optionally scalloped with cheese.

plural of Henderson-Hasselbalch equation

A surname.

plural of Hassell