An Etymological Dictionary of Astronomy and Astrophysics
English-French-Persian

A classification scheme of galaxies based on their apparent shape. → Hubble classification.

→ morphological; → classification.

The act of mystifying or the condition of being mystified.

→ mystify; → -tion.

1) To confuse, bewilder, or puzzle.
2) To make mysterious or obscure.

From Fr. mystifier, from mysti-, irregular combining form of mystique "mystic" or mystère, "→ mystery" + -fier, → -fy.

Same as → Iota Orionis.

From Ar. Nayyir al-Saif (نیر‌السیف) "the Bright One in the Sword," from nayyir (نیر) "bright" + al-saif (السیف) "sword."

A → linear differential equation if Q(x)≠ 0 on interval I.

→ nonhomogeneous; → linear; → differential; → equation.

A → differential equation in which the unknown function depends on only one → independent variable, as contrasted with a → partial differential equation.

→ ordinary; → differential; → equation.

Too highly qualified for a particular job (OxfordDictionaries.com).

→ over-; → qualified.

1) Philosophy of science: A process of revolutionary change in scientific → paradigms, whereby established scientific ideas are replaced by new ones. For instance, Copernicus' evidence that the Earth revolved around the Sun caused a paradigm shift in astronomy.
2) The idea of paradigm shift has been transferred from the sciences to other areas of society and culture, referring to a fundamental reorganization of how people think about an entire topic.

→ paradigm; → shift; → change.

A type of differential equation involving an unknown function (or functions) of several independent variables and its (or their) partial derivatives with respect to those variables.

→ partial; → differential; → equation.

1) The attribution of human nature or character to animals, inanimate objects, or abstract notions, especially as a rhetorical figure.
2) The representation of a thing or abstraction in the form of a person, as in art.
3) The person or thing embodying a quality or the like; an embodiment or incarnation (Dictionary.com).

Verbal noun of → personify.

1) To conceive of or represent as a person or as having human qualities or powers.
2) To be the embodiment or personification of (Merriam-Webster.com).

→ person + -ify, → -fy.

The difference of phase (usually expressed as a time or an angle) between two periodic quantities which vary sinusoidally and have the same frequency.

→ phase; → difference.

Any change in the phase of a periodic quantity or in the phase difference between two or more periodic quantities.

→ phase; → shift.

Between two points, the work done in taking the unit test object from one point to the other. Potential is a scalar quantity.

→ potential; → difference.

Relating to a stage or time prior to the rise of modern science and to the application of the → scientific method.

→ pre-; → scientific.

1) A quality, accomplishment, etc., that fits a person for some function, office, or the like.
2) A circumstance or condition required by law or custom for getting, having, or exercising a right, holding an office, or the like.
3) The act of qualifying; state of being qualified (Dictionary.com).

→ qualify; → -tion.

Having the qualities, accomplishments, etc., that fit a person for some function, office, or the like (Dictionary.com).

Past participle of → qualify.

1) Be entitled to a particular benefit or privilege by fulfilling a necessary condition; become officially recognized as a practitioner of a particular profession or activity, typically by undertaking a course and passing examinations.
2) Officially recognize or establish (someone) as a practitioner of a particular profession or activity (OxfordDictionaries.com).

→ quality; → -fy.

The fact or process of quantifying.

Verbal noun of → quantify.

1) 1) A word that indicates the quantity of something.
2) Math.: A phrase in a logical expression that somehow specifies the quantity of variables. In particular either of the phrases "for all" (written symbolically as ∀) and "there exists" (∃).
3) In → predicate logic, a symbol that applies to, or binds, → variables which represent the → arguments of → predicates. See also → existential quantifier and → universal quantifier. In → first-order logic theses variables must range over → individuals. In higher-order logics they may range over predicates.

Agent noun of → quantify