logo-, log-, -logia, -logic, -logical, -logism, -logician, -logian, -logue

1. Impairment of speech and reasoning as the result of a mental disorder.
2. Impairment of reasoning powers marked by an inability to express ideas in speech.

1. To say in addition to; an additional statement; attachment, adjunct, appendage, addendum.
2. A closing statement; especially, at the end of a play, book, etc.

A reference to the chronology, or time sequences, of the Earth's history as determined by geological events: The world's geochronological past makes it possible for people to understand more clearly how the world unfolded or developed over time.

Shorthand; a word represented by a single sign; also, a letter or character representing a word (more correctly called a logogram). Examples of grammalogues include: &, #, ©, ®, ¶, and @.

Although & is called an ampersand (meaning "and"), there is also a new symbol which is called a questpersand which is pronounced: "and?"

A part or organ that has the same evolutionary origin as another but differs in function, e.g., a bird’s wing in relation to the fin of a fish.

Morbid verbosity, excessive talking, or loquacity.

Lack of the ability to speak.

A medical word.

1. An abnormal or excessive flow of words.
2. Excessive and rapid speech, seen in certain mental disorders; as in manic episodes of bipolar disorder and some cases of schizophrenia.

The inability to recall a word or the right word that a person is trying to remember while talking to another person or people: Petra had lethologicas, or psychological disorders, that inhibited her ability to articulate her thoughts because she was forgetting certain words, phrases, or names during her conversation with her friend on the phone.

1. Any speech defect due to damage of the central nervous system.
2. Partial or total loss of the ability to articulate ideas or comprehend a spoken or written language, resulting from damage to the brain caused by injury or disease.
3. A defect or loss of the ability to speak or write, the loss of the ability to understand spoken or written language, due to injury or disease of the brain centers.

1. The inability to express ideas in writing.
2. The loss of power to express thoughts by means of spoken words as a result of a disease or injury of certain brain centers.

A defect or loss of the power of expression by speech or writing: Terry had a condition of logamnesia because he was unable to recognize spoken or written words by other people, and he was incapable of remembering common words which he knew before his situation came into existence.

A mania, or obsession, for trying to recall forgotten words or a specific word.